Merge pull request #49550 from c0bw3b/sec/1803/openjpeg

[18.03] openjpeg: adding patch for CVE-2018-7648

.editorconfig

@@ -1,5 +1,5 @@
 # EditorConfig configuration for nixpkgs
-# https://EditorConfig.org
+# http://EditorConfig.org
 
 # Top-most EditorConfig file
 root = true
@@ -11,87 +11,18 @@ insert_final_newline = true
 trim_trailing_whitespace = true
 charset = utf-8
 
-# Ignore diffs/patches
-[*.{diff,patch}]
-end_of_line = unset
-insert_final_newline = unset
-trim_trailing_whitespace = unset
-
 # see https://nixos.org/nixpkgs/manual/#chap-conventions
 
-# Match json/lockfiles/markdown/nix/perl/python/ruby/shell/docbook files, set indent to spaces
-[*.{json,lock,md,nix,pl,pm,py,rb,sh,xml}]
+# Match nix/ruby files, set indent to spaces with width of two
+[*.{nix,rb}]
 indent_style = space
-
-# Match docbook files, set indent width of one
-[*.xml]
-indent_size = 1
-
-# Match json/lockfiles/markdown/nix/ruby files, set indent width of two
-[*.{json,lock,md,nix,rb}]
 indent_size = 2
 
-# Match perl/python/shell scripts, set indent width of four
-[*.{pl,pm,py,sh}]
+# Match shell/python/perl scripts, set indent to spaces with width of four
+[*.{sh,py,pl}]
+indent_style = space
 indent_size = 4
 
-# Match gemfiles, set indent to spaces with width of two
-[Gemfile]
-indent_size = 2
-indent_style = space
-
-# Disable file types or individual files
-# some of these files may be auto-generated and/or require significant changes
-
-[*.{c,h}]
-insert_final_newline = unset
-trim_trailing_whitespace = unset
-
-[*.{asc,key,ovpn}]
-insert_final_newline = unset
-end_of_line = unset
-trim_trailing_whitespace = unset
-
-[*.lock]
-indent_size = unset
-
-# Although Markdown/CommonMark allows using two trailing spaces to denote
-# a hard line break, we do not use that feature in nixpkgs since
-# it forces the surrounding paragraph to become a <literallayout> which
-# does not wrap reasonably.
-# Instead of a hard line break, start a new paragraph by inserting a blank line.
-[*.md]
-trim_trailing_whitespace = true
-
-# binaries
-[*.nib]
-end_of_line = unset
-insert_final_newline = unset
-trim_trailing_whitespace = unset
-charset = unset
-
-[eggs.nix]
-trim_trailing_whitespace = unset
-
-[nixos/modules/services/networking/ircd-hybrid/*.{conf,in}]
-trim_trailing_whitespace = unset
-
-[pkgs/build-support/dotnetenv/Wrapper/**]
-end_of_line = unset
-indent_style = unset
-insert_final_newline = unset
-trim_trailing_whitespace = unset
-
-[pkgs/development/compilers/elm/registry.dat]
-end_of_line = unset
-insert_final_newline = unset
-
-[pkgs/development/haskell-modules/hackage-packages.nix]
-indent_style = unset
-trim_trailing_whitespace = unset
-
-[pkgs/servers/dict/wordnet_structures.py]
-trim_trailing_whitespace = unset
-
-[pkgs/tools/misc/timidity/timidity.cfg]
-trim_trailing_whitespace = unset
+# Match diffs, avoid to trim trailing whitespace
+[*.{diff,patch}]
+trim_trailing_whitespace = false

.git-blame-ignore-revs

@@ -1,41 +0,0 @@
-# This file contains a list of commits that are not likely what you
-# are looking for in a blame, such as mass reformatting or renaming.
-# You can set this file as a default ignore file for blame by running
-# the following command.
-#
-# $ git config blame.ignoreRevsFile .git-blame-ignore-revs
-#
-# To temporarily not use this file add
-# --ignore-revs-file=""
-# to your blame command.
-#
-# The ignoreRevsFile can't be set globally due to blame failing if the file isn't present.
-# To not have to set the option in every repository it is needed in,
-# save the following script in your path with the name "git-bblame"
-# now you can run
-# $ git bblame $FILE
-# to use the .git-blame-ignore-revs file if it is present.
-#
-# #!/usr/bin/env bash
-# repo_root=$(git rev-parse --show-toplevel)
-# if [[ -e $repo_root/.git-blame-ignore-revs ]]; then
-#     git blame --ignore-revs-file="$repo_root/.git-blame-ignore-revs" $@
-# else
-#     git blame $@
-# fi
-
-
-# nixos/modules/rename: Sort alphabetically
-1f71224fe86605ef4cd23ed327b3da7882dad382
-
-# manual: fix typos
-feddd5e7f8c6f8167b48a077fa2a5394dc008999
-
-# nixos: fix module paths in rename.nix
-d08ede042b74b8199dc748323768227b88efcf7c
-
-# fix indentation in mk-python-derivation.nix
-d1c1a0c656ccd8bd3b25d3c4287f2d075faf3cf3
-
-# fix indentation in meteor default.nix
-a37a6de881ec4c6708e6b88fd16256bbc7f26bbd

.gitattributes

@@ -1,17 +0,0 @@
-**/deps.nix linguist-generated
-**/deps.json linguist-generated
-**/node-packages.nix linguist-generated
-
-pkgs/applications/editors/emacs-modes/*-generated.nix linguist-generated
-pkgs/development/r-modules/*-packages.nix linguist-generated
-pkgs/development/haskell-modules/hackage-packages.nix linguist-generated
-pkgs/development/beam-modules/hex-packages.nix linguist-generated
-
-doc/** linguist-documentation
-doc/default.nix linguist-documentation=false
-
-nixos/doc/** linguist-documentation
-nixos/doc/default.nix linguist-documentation=false
-
-nixos/modules/module-list.nix merge=union
-# pkgs/top-level/all-packages.nix merge=union

.github/CODEOWNERS

@@ -6,69 +6,28 @@
 #
 # For documentation on this file, see https://help.github.com/articles/about-codeowners/
 # Mentioned users will get code review requests.
-#
-# IMPORTANT NOTE: in order to actually get pinged, commit access is required.
-# This also holds true for GitHub teams. Since almost none of our teams have write
-# permissions, you need to list all members of the team with commit access individually.
 
 # This file
 /.github/CODEOWNERS @edolstra
 
-# GitHub actions
-/.github/workflows @NixOS/Security @Mic92 @zowoq
-/.github/workflows/merge-staging @FRidh
-
-# EditorConfig
-/.editorconfig @Mic92 @zowoq
-
 # Libraries
-/lib                        @edolstra @nbp @infinisil
-/lib/systems                @alyssais @nbp @ericson2314 @matthewbauer
-/lib/generators.nix         @edolstra @nbp @Profpatsch
-/lib/cli.nix                @edolstra @nbp @Profpatsch
-/lib/debug.nix              @edolstra @nbp @Profpatsch
-/lib/asserts.nix            @edolstra @nbp @Profpatsch
-/lib/path.*                 @infinisil @fricklerhandwerk
+/lib                        @edolstra @nbp
+/lib/systems                @nbp @ericson2314
 
 # Nixpkgs Internals
-/default.nix                                     @nbp
-/pkgs/top-level/default.nix                      @nbp @Ericson2314
-/pkgs/top-level/impure.nix                       @nbp @Ericson2314
-/pkgs/top-level/stage.nix                        @nbp @Ericson2314 @matthewbauer
-/pkgs/top-level/splice.nix                       @Ericson2314 @matthewbauer
-/pkgs/top-level/release-cross.nix                @Ericson2314 @matthewbauer
-/pkgs/stdenv/generic                             @Ericson2314 @matthewbauer
-/pkgs/stdenv/generic/check-meta.nix              @Ericson2314 @matthewbauer @piegamesde
-/pkgs/stdenv/cross                               @Ericson2314 @matthewbauer
-/pkgs/build-support/cc-wrapper                   @Ericson2314
-/pkgs/build-support/bintools-wrapper             @Ericson2314
-/pkgs/build-support/setup-hooks                  @Ericson2314
-/pkgs/build-support/setup-hooks/auto-patchelf.sh @layus
-/pkgs/build-support/setup-hooks/auto-patchelf.py @layus
-
-# Nixpkgs build-support
-/pkgs/build-support/writers @lassulus @Profpatsch
-
-# Nixpkgs make-disk-image
-/doc/builders/images/makediskimage.section.md  @raitobezarius
-/nixos/lib/make-disk-image.nix                 @raitobezarius
-
-# Nixpkgs documentation
-/maintainers/scripts/db-to-md.sh @jtojnar @ryantm
-/maintainers/scripts/doc @jtojnar @ryantm
-
-/doc/* @fricklerhandwerk
-/doc/build-aux/pandoc-filters @jtojnar
-/doc/builders/trivial-builders.chapter.md @fricklerhandwerk
-/doc/contributing/ @fricklerhandwerk
-/doc/contributing/contributing-to-documentation.chapter.md @jtojnar @fricklerhandwerk
-/doc/stdenv @fricklerhandwerk
-/doc/using @fricklerhandwerk
+/default.nix                          @nbp
+/pkgs/top-level/default.nix           @nbp @Ericson2314
+/pkgs/top-level/impure.nix            @nbp @Ericson2314
+/pkgs/top-level/stage.nix             @nbp @Ericson2314
+/pkgs/stdenv
+/pkgs/build-support/cc-wrapper        @Ericson2314 @orivej
+/pkgs/build-support/bintools-wrapper  @Ericson2314 @orivej
+/pkgs/build-support/setup-hooks       @Ericson2314
 
 # NixOS Internals
-/nixos/default.nix          @nbp @infinisil
-/nixos/lib/from-env.nix     @nbp @infinisil
-/nixos/lib/eval-config.nix  @nbp @infinisil
+/nixos/default.nix          @nbp
+/nixos/lib/from-env.nix     @nbp
+/nixos/lib/eval-config.nix  @nbp
 /nixos/doc/manual/configuration/abstractions.xml      @nbp
 /nixos/doc/manual/configuration/config-file.xml       @nbp
 /nixos/doc/manual/configuration/config-syntax.xml     @nbp
@@ -82,232 +41,53 @@
 /nixos/doc/manual/development/writing-modules.xml     @nbp
 /nixos/doc/manual/man-nixos-option.xml                @nbp
 /nixos/modules/installer/tools/nixos-option.sh        @nbp
-/nixos/modules/system                                 @dasJ
-/nixos/modules/system/activation/bootspec.nix         @grahamc @cole-h @raitobezarius
-/nixos/modules/system/activation/bootspec.cue         @grahamc @cole-h @raitobezarius
-
-# NixOS integration test driver
-/nixos/lib/test-driver  @tfc
-
-# Systemd
-/nixos/modules/system/boot/systemd.nix      @NixOS/systemd
-/nixos/modules/system/boot/systemd          @NixOS/systemd
-/nixos/lib/systemd-*.nix                    @NixOS/systemd
-/pkgs/os-specific/linux/systemd             @NixOS/systemd
-
-# Updaters
-## update.nix
-/maintainers/scripts/update.nix   @jtojnar
-/maintainers/scripts/update.py    @jtojnar
-## common-updater-scripts
-/pkgs/common-updater/scripts/update-source-version    @jtojnar
 
 # Python-related code and docs
-/maintainers/scripts/update-python-libraries	              @FRidh
-/pkgs/top-level/python-packages.nix                         @FRidh @jonringer
-/pkgs/development/interpreters/python                       @FRidh
-/pkgs/development/python-modules                            @FRidh @jonringer
-/doc/languages-frameworks/python.section.md                 @FRidh @mweinelt
-/pkgs/development/tools/poetry2nix                          @adisbladis
-/pkgs/development/interpreters/python/hooks                 @FRidh @jonringer
+/pkgs/top-level/python-packages.nix     @FRidh
+/pkgs/development/interpreters/python   @FRidh
+/pkgs/development/python-modules        @FRidh
+/doc/languages-frameworks/python.md     @FRidh
 
 # Haskell
-/doc/languages-frameworks/haskell.section.md  @cdepillabout @sternenseemann @maralorn
-/maintainers/scripts/haskell                  @cdepillabout @sternenseemann @maralorn
-/pkgs/development/compilers/ghc               @cdepillabout @sternenseemann @maralorn
-/pkgs/development/haskell-modules             @cdepillabout @sternenseemann @maralorn
-/pkgs/test/haskell                            @cdepillabout @sternenseemann @maralorn
-/pkgs/top-level/release-haskell.nix           @cdepillabout @sternenseemann @maralorn
-/pkgs/top-level/haskell-packages.nix          @cdepillabout @sternenseemann @maralorn
-
-# Perl
-/pkgs/development/interpreters/perl @stigtsp @zakame @dasJ
-/pkgs/top-level/perl-packages.nix   @stigtsp @zakame @dasJ
-/pkgs/development/perl-modules      @stigtsp @zakame @dasJ
+/pkgs/development/compilers/ghc                       @peti
+/pkgs/development/haskell-modules                     @peti
+/pkgs/development/haskell-modules/default.nix         @peti
+/pkgs/development/haskell-modules/generic-builder.nix @peti
+/pkgs/development/haskell-modules/hoogle.nix          @peti
 
 # R
-/pkgs/applications/science/math/R   @jbedo
-/pkgs/development/r-modules         @jbedo
+/pkgs/applications/science/math/R   @peti
+/pkgs/development/r-modules         @peti
 
 # Ruby
-/pkgs/development/interpreters/ruby @marsam
-/pkgs/development/ruby-modules      @marsam
+/pkgs/development/interpreters/ruby @zimbatm
+/pkgs/development/ruby-modules      @zimbatm
 
-# Rust
-/pkgs/development/compilers/rust @Mic92 @LnL7 @zowoq @winterqt @figsoda
-/pkgs/build-support/rust @zowoq @winterqt @figsoda
-/doc/languages-frameworks/rust.section.md @zowoq @winterqt @figsoda
+# Darwin-related
+/pkgs/stdenv/darwin         @NixOS/darwin-maintainers
+/pkgs/os-specific/darwin    @NixOS/darwin-maintainers
 
-# C compilers
-/pkgs/development/compilers/gcc @matthewbauer
-/pkgs/development/compilers/llvm @matthewbauer
-
-# Compatibility stuff
-/pkgs/top-level/unix-tools.nix @matthewbauer
-/pkgs/development/tools/xcbuild @matthewbauer
-
-# Audio
-/nixos/modules/services/audio/botamusique.nix @mweinelt
-/nixos/modules/services/audio/snapserver.nix @mweinelt
-/nixos/tests/modules/services/audio/botamusique.nix @mweinelt
-/nixos/tests/snapcast.nix @mweinelt
-
-# Browsers
-/pkgs/applications/networking/browsers/firefox @mweinelt
-
-# Certificate Authorities
-pkgs/data/misc/cacert/ @ajs124 @lukegb @mweinelt
-pkgs/development/libraries/nss/ @ajs124 @lukegb @mweinelt
-pkgs/development/python-modules/buildcatrust/ @ajs124 @lukegb @mweinelt
+# Beam-related (Erlang, Elixir, LFE, etc)
+/pkgs/development/beam-modules                  @gleber
+/pkgs/development/interpreters/erlang           @gleber
+/pkgs/development/interpreters/lfe              @gleber
+/pkgs/development/interpreters/elixir           @gleber
+/pkgs/development/tools/build-managers/rebar    @gleber
+/pkgs/development/tools/build-managers/rebar3   @gleber
+/pkgs/development/tools/erlang                  @gleber
 
 # Jetbrains
 /pkgs/applications/editors/jetbrains @edwtjo
 
-# Licenses
-/lib/licenses.nix @alyssais
+# Eclipse
+/pkgs/applications/editors/eclipse @rycee
+
+# https://github.com/NixOS/nixpkgs/issues/31401
+/lib/maintainers.nix @ghost
+/lib/licenses.nix @ghost
 
 # Qt / KDE
 /pkgs/applications/kde @ttuegel
 /pkgs/desktops/plasma-5 @ttuegel
 /pkgs/development/libraries/kde-frameworks @ttuegel
 /pkgs/development/libraries/qt-5 @ttuegel
-
-# PostgreSQL and related stuff
-/pkgs/servers/sql/postgresql @thoughtpolice @marsam
-/nixos/modules/services/databases/postgresql.xml @thoughtpolice
-/nixos/modules/services/databases/postgresql.nix @thoughtpolice
-/nixos/tests/postgresql.nix @thoughtpolice
-
-# Hardened profile & related modules
-/nixos/modules/profiles/hardened.nix @joachifm
-/nixos/modules/security/hidepid.nix @joachifm
-/nixos/modules/security/lock-kernel-modules.nix @joachifm
-/nixos/modules/security/misc.nix @joachifm
-/nixos/tests/hardened.nix @joachifm
-/pkgs/os-specific/linux/kernel/hardened-config.nix @joachifm
-
-# Home Automation
-/nixos/modules/services/misc/home-assistant.nix @mweinelt
-/nixos/modules/services/misc/zigbee2mqtt.nix @mweinelt
-/nixos/tests/home-assistant.nix @mweinelt
-/nixos/tests/zigbee2mqtt.nix @mweinelt
-/pkgs/servers/home-assistant @mweinelt
-/pkgs/tools/misc/esphome @mweinelt
-
-# Network Time Daemons
-/pkgs/tools/networking/chrony @thoughtpolice
-/pkgs/tools/networking/ntp @thoughtpolice
-/pkgs/tools/networking/openntpd @thoughtpolice
-/nixos/modules/services/networking/ntp @thoughtpolice
-
-# Network
-/pkgs/tools/networking/kea/default.nix @mweinelt
-/pkgs/tools/networking/babeld/default.nix @mweinelt
-/nixos/modules/services/networking/babeld.nix @mweinelt
-/nixos/modules/services/networking/kea.nix @mweinelt
-/nixos/modules/services/networking/knot.nix @mweinelt
-/nixos/modules/services/monitoring/prometheus/exporters/kea.nix @mweinelt
-/nixos/tests/babeld.nix @mweinelt
-/nixos/tests/kea.nix @mweinelt
-/nixos/tests/knot.nix @mweinelt
-
-# Dhall
-/pkgs/development/dhall-modules      @Gabriella439 @Profpatsch @ehmry
-/pkgs/development/interpreters/dhall @Gabriella439 @Profpatsch @ehmry
-
-# Idris
-/pkgs/development/idris-modules @Infinisil
-
-# Bazel
-/pkgs/development/tools/build-managers/bazel @Profpatsch
-
-# NixOS modules for e-mail and dns services
-/nixos/modules/services/mail/mailman.nix    @peti
-/nixos/modules/services/mail/postfix.nix    @peti
-/nixos/modules/services/networking/bind.nix @peti
-/nixos/modules/services/mail/rspamd.nix     @peti
-
-# Emacs
-/pkgs/applications/editors/emacs/elisp-packages @adisbladis
-/pkgs/applications/editors/emacs                @adisbladis
-/pkgs/top-level/emacs-packages.nix              @adisbladis
-
-# Neovim
-/pkgs/applications/editors/neovim      @figsoda @jonringer @teto
-
-# VimPlugins
-/pkgs/applications/editors/vim/plugins         @figsoda @jonringer
-
-# VsCode Extensions
-/pkgs/applications/editors/vscode/extensions   @jonringer
-
-# Prometheus exporter modules and tests
-/nixos/modules/services/monitoring/prometheus/exporters.nix  @WilliButz
-/nixos/modules/services/monitoring/prometheus/exporters.xml  @WilliButz
-/nixos/tests/prometheus-exporters.nix                        @WilliButz
-
-# PHP interpreter, packages, extensions, tests and documentation
-/doc/languages-frameworks/php.section.md          @aanderse @etu @globin @ma27 @talyz
-/nixos/tests/php                                  @aanderse @etu @globin @ma27 @talyz
-/pkgs/build-support/build-pecl.nix                @aanderse @etu @globin @ma27 @talyz
-/pkgs/development/interpreters/php       @jtojnar @aanderse @etu @globin @ma27 @talyz
-/pkgs/development/php-packages                    @aanderse @etu @globin @ma27 @talyz
-/pkgs/top-level/php-packages.nix         @jtojnar @aanderse @etu @globin @ma27 @talyz
-
-# Podman, CRI-O modules and related
-/nixos/modules/virtualisation/containers.nix @zowoq @adisbladis
-/nixos/modules/virtualisation/cri-o.nix      @zowoq @adisbladis
-/nixos/modules/virtualisation/podman         @zowoq @adisbladis
-/nixos/tests/cri-o.nix                       @zowoq @adisbladis
-/nixos/tests/podman                          @zowoq @adisbladis
-
-# Docker tools
-/pkgs/build-support/docker                   @roberth
-/nixos/tests/docker-tools*                   @roberth
-/doc/builders/images/dockertools.section.md  @roberth
-
-# Blockchains
-/pkgs/applications/blockchains  @mmahut @RaghavSood
-
-# Go
-/doc/languages-frameworks/go.section.md @kalbasit @Mic92 @zowoq
-/pkgs/build-support/go @kalbasit @Mic92 @zowoq
-/pkgs/development/compilers/go @kalbasit @Mic92 @zowoq
-
-# GNOME
-/pkgs/desktops/gnome                              @jtojnar
-/pkgs/desktops/gnome/extensions       @piegamesde @jtojnar
-/pkgs/build-support/make-hardcode-gsettings-patch @jtojnar
-
-# Cinnamon
-/pkgs/desktops/cinnamon @mkg20001
-
-# nim
-/pkgs/development/compilers/nim   @ehmry
-/pkgs/development/nim-packages    @ehmry
-/pkgs/top-level/nim-packages.nix  @ehmry
-
-# terraform providers
-/pkgs/applications/networking/cluster/terraform-providers @zowoq
-
-# kubernetes
-/nixos/doc/manual/configuration/kubernetes.chapter.md @zowoq
-/nixos/modules/services/cluster/kubernetes            @zowoq
-/nixos/tests/kubernetes                               @zowoq
-/pkgs/applications/networking/cluster/kubernetes      @zowoq
-
-# Matrix
-/pkgs/servers/heisenbridge                                 @piegamesde
-/pkgs/servers/matrix-conduit                               @piegamesde
-/nixos/modules/services/misc/heisenbridge.nix              @piegamesde
-/nixos/modules/services/misc/matrix-conduit.nix            @piegamesde
-/nixos/tests/matrix-conduit.nix                            @piegamesde
-
-# Dotnet
-/pkgs/build-support/dotnet          @IvarWithoutBones
-/pkgs/development/compilers/dotnet  @IvarWithoutBones
-
-# Node.js
-/pkgs/build-support/node/build-npm-package      @winterqt
-/pkgs/build-support/node/fetch-npm-deps         @winterqt
-/doc/languages-frameworks/javascript.section.md @winterqt

.github/CONTRIBUTING.md

@@ -0,0 +1,52 @@
+# How to contribute
+
+Note: contributing implies licensing those contributions
+under the terms of [COPYING](../COPYING), which is an MIT-like license.
+
+## Opening issues
+
+* Make sure you have a [GitHub account](https://github.com/signup/free)
+* [Submit an issue](https://github.com/NixOS/nixpkgs/issues) - assuming one does not already exist.
+  * Clearly describe the issue including steps to reproduce when it is a bug.
+  * Include information what version of nixpkgs and Nix are you using (nixos-version or git revision).
+
+## Submitting changes
+
+* Format the commit messages in the following way:
+
+  ```
+  (pkg-name | nixos/<module>): (from -> to | init at version | refactor | etc)
+
+  (Motivation for change. Additional information.)
+  ```
+
+  Examples:
+
+  * nginx: init at 2.0.1
+  * firefox: 54.0.1 -> 55.0
+  * nixos/hydra: add bazBaz option
+
+    Dual baz behavior is needed to do foo.
+  * nixos/nginx: refactor config generation
+
+    The old config generation system used impure shell scripts and could break in specific circumstances (see #1234).
+
+* `meta.description` should:
+  * Be capitalized.
+  * Not start with the package name.
+  * Not have a period at the end.
+* `meta.license` must be set and fit the upstream license.
+  * If there is no upstream license, `meta.license` should default to `stdenv.lib.licenses.unfree`.
+* `meta.maintainers` must be set.
+
+See the nixpkgs manual for more details on [standard meta-attributes](https://nixos.org/nixpkgs/manual/#sec-standard-meta-attributes) and on how to [submit changes to nixpkgs](https://nixos.org/nixpkgs/manual/#chap-submitting-changes).
+
+## Writing good commit messages
+
+In addition to writing properly formatted commit messages, it's important to include relevant information so other developers can later understand *why* a change was made. While this information usually can be found by digging code, mailing list archives, pull request discussions or upstream changes, it may require a lot of work.
+
+For package version upgrades and such a one-line commit message is usually sufficient.
+
+## Reviewing contributions
+
+See the nixpkgs manual for more details on how to [Review contributions](https://nixos.org/nixpkgs/manual/#sec-reviewing-contributions).

.github/ISSUE_TEMPLATE.md

@@ -8,4 +8,5 @@
 
 ## Technical details
 
-Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.
+Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the
+results.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,41 +0,0 @@
----
-name: Bug report
-about: Create a report to help us improve
-title: ''
-labels: '0.kind: bug'
-assignees: ''
-
----
-
-### Describe the bug
-A clear and concise description of what the bug is.
-
-### Steps To Reproduce
-Steps to reproduce the behavior:
-1. ...
-2. ...
-3. ...
-
-### Expected behavior
-A clear and concise description of what you expected to happen.
-
-### Screenshots
-If applicable, add screenshots to help explain your problem.
-
-### Additional context
-Add any other context about the problem here.
-
-### Notify maintainers
-
-<!--
-Please @ people who are in the `meta.maintainers` list of the offending package or module.
-If in doubt, check `git blame` for whoever last touched something.
--->
-
-### Metadata
-Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.
-
-```console
-[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
-output here
-```

.github/ISSUE_TEMPLATE/build_failure.md

@@ -1,39 +0,0 @@
----
-name: Build failure
-about: Create a report to help us improve
-title: 'Build failure: PACKAGENAME'
-labels: '0.kind: build failure'
-assignees: ''
-
----
-
-### Steps To Reproduce
-
-Steps to reproduce the behavior:
-1. build *X*
-
-### Build log
-
-```
-log here if short otherwise a link to a gist
-```
-
-### Additional context
-
-Add any other context about the problem here.
-
-### Notify maintainers
-
-<!--
-Please @ people who are in the `meta.maintainers` list of the offending package or module.
-If in doubt, check `git blame` for whoever last touched something.
--->
-
-### Metadata
-
-Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.
-
-```console
-[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
-output here
-```

.github/ISSUE_TEMPLATE/missing_documentation.md

@@ -1,32 +0,0 @@
----
-name: Missing or incorrect documentation
-about: Help us improve the Nixpkgs and NixOS reference manuals
-title: 'Documentation: '
-labels: '9.needs: documentation'
-assignees: ''
-
----
-
-## Problem
-
-<!-- describe your problem -->
-
-## Proposal
-
-<!-- propose a solution (optional) -->
-
-## Checklist
-
-<!-- make sure this issue is not redundant or obsolete -->
-
-- [ ] checked [latest Nixpkgs manual] \([source][nixpkgs-source]) and [latest NixOS manual] \([source][nixos-source])
-- [ ] checked [open documentation issues] for possible duplicates
-- [ ] checked [open documentation pull requests] for possible solutions
-
-[latest Nixpkgs manual]: https://nixos.org/manual/nixpkgs/unstable/
-[latest NixOS manual]: https://nixos.org/manual/nixos/unstable/
-[nixpkgs-source]: https://github.com/NixOS/nixpkgs/tree/master/doc
-[nixos-source]: https://github.com/NixOS/nixpkgs/tree/master/nixos/doc/manual
-[open documentation issues]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+label%3A%229.needs%3A+documentation%22
-[open documentation pull requests]: https://github.com/NixOS/nixpkgs/pulls?q=is%3Aopen+is%3Apr+label%3A%228.has%3A+documentation%22%2C%226.topic%3A+documentation%22
-

.github/ISSUE_TEMPLATE/out_of_date_package_report.md

@@ -1,28 +0,0 @@
----
-name: Out-of-date package reports
-about: For packages that are out-of-date
-title: 'Update request: PACKAGENAME OLDVERSION → NEWVERSION'
-labels: '9.needs: package (update)'
-assignees: ''
-
----
-
-- Package name:
-- Latest released version:
-<!-- Search your package here: https://search.nixos.org/packages?channel=unstable -->
-- Current version on the unstable channel:
-- Current version on the stable/release channel:
-<!--
-Type the name of your package and try to find an open pull request for the package
-If you find an open pull request, you can review it!
-There's a high chance that you'll have the new version right away while helping the community!
--->
-- [ ] Checked the [nixpkgs pull requests](https://github.com/NixOS/nixpkgs/pulls)
-
-**Notify maintainers**
-
-<!-- If the search.nixos.org result shows no maintainers, tag the person that last updated the package. -->
-
------
-
-Note for maintainers: Please tag this issue in your PR.

.github/ISSUE_TEMPLATE/packaging_request.md

@@ -1,19 +0,0 @@
----
-name: Packaging requests
-about: For packages that are missing
-title: 'Package request: PACKAGENAME'
-labels: '0.kind: packaging request'
-assignees: ''
-
----
-
-**Project description**
-
-<!-- Describe the project a little: -->
-
-**Metadata**
-
-* homepage URL:
-* source URL:
-* license: mit, bsd, gpl2+ , ...
-* platforms: unix, linux, darwin, ...

.github/ISSUE_TEMPLATE/unreproducible_package.md

@@ -1,31 +0,0 @@
----
-name: Unreproducible package
-about: A package that does not produce a bit-by-bit reproducible result each time it is built
-title: ''
-labels: [ '0.kind: enhancement', '6.topic: reproducible builds' ]
-assignees: ''
-
----
-
-Building this package twice does not produce the bit-by-bit identical result each time, making it harder to detect CI breaches. You can read more about this at https://reproducible-builds.org/ .
-
-Fixing bit-by-bit reproducibility also has additional advantages, such as avoiding hard-to-reproduce bugs, making content-addressed storage more effective and reducing rebuilds in such systems.
-
-### Steps To Reproduce
-
-```
-nix-build '<nixpkgs>' -A ... --check --keep-failed
-```
-
-You can use `diffoscope` to analyze the differences in the output of the two builds.
-
-To view the build log of the build that produced the artifact in the binary cache:
-
-```
-nix-store --read-log $(nix-instantiate '<nixpkgs>' -A ...)
-```
-
-### Additional context
-
-(please share the relevant fragment of the diffoscope output here,
-and any additional analysis you may have done)

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,40 +1,19 @@
-###### Description of changes
+###### Motivation for this change
 
-<!--
-For package updates please link to a changelog or describe changes, this helps your fellow maintainers discover breaking updates.
-For new packages please briefly describe the package or provide a link to its homepage.
--->
 
 ###### Things done
 
 <!-- Please check what applies. Note that these are not hard requirements but merely serve as information for reviewers. -->
 
+- [ ] Tested using sandboxing ([nix.useSandbox](http://nixos.org/nixos/manual/options.html#opt-nix.useSandbox) on NixOS, or option `build-use-sandbox` in [`nix.conf`](http://nixos.org/nix/manual/#sec-conf-file) on non-NixOS)
 - Built on platform(s)
-  - [ ] x86_64-linux
-  - [ ] aarch64-linux
-  - [ ] x86_64-darwin
-  - [ ] aarch64-darwin
-- [ ] For non-Linux: Is `sandbox = true` set in `nix.conf`? (See [Nix manual](https://nixos.org/manual/nix/stable/command-ref/conf-file.html))
-- [ ] Tested, as applicable:
-  - [NixOS test(s)](https://nixos.org/manual/nixos/unstable/index.html#sec-nixos-tests) (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests))
-  - and/or [package tests](https://nixos.org/manual/nixpkgs/unstable/#sec-package-tests)
-  - or, for functions and "core" functionality, tests in [lib/tests](https://github.com/NixOS/nixpkgs/blob/master/lib/tests) or [pkgs/test](https://github.com/NixOS/nixpkgs/blob/master/pkgs/test)
-  - made sure NixOS tests are [linked](https://nixos.org/manual/nixpkgs/unstable/#ssec-nixos-tests-linking) to the relevant packages
-- [ ] Tested compilation of all packages that depend on this change using `nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD"`. Note: all changes have to be committed, also see [nixpkgs-review usage](https://github.com/Mic92/nixpkgs-review#usage)
-- [ ] Tested basic functionality of all binary files (usually in `./result/bin/`)
-- [23.05 Release Notes (or backporting 22.11 Release notes)](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#generating-2305-release-notes)
-  - [ ] (Package updates) Added a release notes entry if the change is major or breaking
-  - [ ] (Module updates) Added a release notes entry if the change is significant
-  - [ ] (Module addition) Added a release notes entry if adding a new NixOS module
-- [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md).
+   - [ ] NixOS
+   - [ ] macOS
+   - [ ] other Linux distributions
+- [ ] Tested via one or more NixOS test(s) if existing and applicable for the change (look inside [nixos/tests](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests))
+- [ ] Tested compilation of all pkgs that depend on this change using `nix-shell -p nox --run "nox-review wip"`
+- [ ] Tested execution of all binary files (usually in `./result/bin/`)
+- [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/.github/CONTRIBUTING.md).
 
-<!--
-To help with the large amounts of pull requests, we would appreciate your
-reviews of other pull requests, especially simple package updates. Just leave a
-comment describing what you have tested in the relevant package/service.
-Reviewing helps to reduce the average time-to-merge for everyone.
-Thanks a lot if you do!
+---
 
-List of open PRs: https://github.com/NixOS/nixpkgs/pulls
-Reviewing guidelines: https://nixos.org/manual/nixpkgs/unstable/#chap-reviewing-contributions
--->

.github/STALE-BOT.md

@@ -1,36 +0,0 @@
-# Stale bot information
-
-- Thanks for your contribution!
-- Our stale bot will never close an issue or PR.
-- To remove the stale label, just leave a new comment.
-- _How to find the right people to ping?_ → [`git blame`](https://git-scm.com/docs/git-blame) to the rescue! (or GitHub's history and blame buttons.)
-- You can always ask for help on [our Discourse Forum](https://discourse.nixos.org/), [our Matrix room](https://matrix.to/#/#nix:nixos.org), or on the [#nixos IRC channel](https://web.libera.chat/#nixos).
-
-## Suggestions for PRs
-
-1. GitHub sometimes doesn't notify people who commented / reviewed a PR previously, when you (force) push commits. If you have addressed the reviews you can [officially ask for a review](https://docs.github.com/en/free-pro-team@latest/github/collaborating-with-issues-and-pull-requests/requesting-a-pull-request-review) from those who commented to you or anyone else.
-2. If it is unfinished but you plan to finish it, please mark it as a draft.
-3. If you don't expect to work on it any time soon, closing it with a short comment may encourage someone else to pick up your work.
-4. To get things rolling again, rebase the PR against the target branch and address valid comments.
-5. If you need a review to move forward, ask in [the Discourse thread for PRs that need help](https://discourse.nixos.org/t/prs-in-distress/3604).
-6. If all you need is a merge, check the git history to find and [request reviews](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/requesting-a-pull-request-review) from people who usually merge related contributions.
-
-## Suggestions for issues
-
-1. If it is resolved (either for you personally, or in general), please consider closing it.
-2. If this might still be an issue, but you are not interested in promoting its resolution, please consider closing it while encouraging others to take over and reopen an issue if they care enough.
-3. If you still have interest in resolving it, try to ping somebody who you believe might have an interest in the topic. Consider discussing the problem in [our Discourse Forum](https://discourse.nixos.org/).
-4. As with all open source projects, your best option is to submit a Pull Request that addresses this issue. We :heart: this attitude!
-
-**Memorandum on closing issues**
-
-Don't be afraid to close an issue that holds valuable information. Closed issues stay in the system for people to search, read, cross-reference, or even reopen--nothing is lost! Closing obsolete issues is an important way to help maintainers focus their time and effort.
-
-## Useful GitHub search queries
-
-- [Open PRs with any stale-bot interaction](https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+commenter%3Aapp%2Fstale+)
-- [Open PRs with any stale-bot interaction and `2.status: stale`](https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+commenter%3Aapp%2Fstale+label%3A%222.status%3A+stale%22)
-- [Open PRs with any stale-bot interaction and NOT `2.status: stale`](https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+commenter%3Aapp%2Fstale+-label%3A%222.status%3A+stale%22+)
-- [Open Issues with any stale-bot interaction](https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+commenter%3Aapp%2Fstale+)
-- [Open Issues with any stale-bot interaction and `2.status: stale`](https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+commenter%3Aapp%2Fstale+label%3A%222.status%3A+stale%22+)
-- [Open Issues with any stale-bot interaction and NOT `2.status: stale`](https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+commenter%3Aapp%2Fstale+-label%3A%222.status%3A+stale%22+)

.github/dependabot.yml

@@ -1,6 +0,0 @@
-version: 2
-updates:
-  - package-ecosystem: "github-actions"
-    directory: "/"
-    schedule:
-      interval: "weekly"

.github/labeler.yml

@@ -1,181 +0,0 @@
-"6.topic: agda":
-  - doc/languages-frameworks/agda.section.md
-  - nixos/tests/agda.nix
-  - pkgs/build-support/agda/**/*
-  - pkgs/development/libraries/agda/**/*
-  - pkgs/top-level/agda-packages.nix
-
-"6.topic: cinnamon":
-  - pkgs/desktops/cinnamon/**/*
-  - nixos/modules/services/x11/desktop-managers/cinnamon.nix
-  - nixos/tests/cinnamon.nix
-
-"6.topic: emacs":
-  - nixos/modules/services/editors/emacs.nix
-  - nixos/modules/services/editors/emacs.xml
-  - nixos/tests/emacs-daemon.nix
-  - pkgs/applications/editors/emacs/elisp-packages/**/*
-  - pkgs/applications/editors/emacs/**/*
-  - pkgs/build-support/emacs/**/*
-  - pkgs/top-level/emacs-packages.nix
-
-"6.topic: Enlightenment DE":
-  - nixos/modules/services/x11/desktop-managers/enlightenment.nix
-  - pkgs/desktops/enlightenment/**/*
-  - pkgs/development/python-modules/python-efl/*
-
-"6.topic: erlang":
-  - doc/languages-frameworks/beam.section.md
-  - pkgs/development/beam-modules/**/*
-  - pkgs/development/interpreters/elixir/**/*
-  - pkgs/development/interpreters/erlang/**/*
-  - pkgs/development/tools/build-managers/rebar/**/*
-  - pkgs/development/tools/build-managers/rebar3/**/*
-  - pkgs/development/tools/erlang/**/*
-  - pkgs/top-level/beam-packages.nix
-
-"6.topic: fetch":
-  - pkgs/build-support/fetch*/**/*
-
-"6.topic: GNOME":
-  - doc/languages-frameworks/gnome.section.md
-  - nixos/modules/services/desktops/gnome/**/*
-  - nixos/modules/services/x11/desktop-managers/gnome.nix
-  - nixos/tests/gnome-xorg.nix
-  - nixos/tests/gnome.nix
-  - pkgs/desktops/gnome/**/*
-
-"6.topic: golang":
-  - doc/languages-frameworks/go.section.md
-  - pkgs/build-support/go/**/*
-  - pkgs/development/compilers/go/**/*
-
-"6.topic: haskell":
-  - doc/languages-frameworks/haskell.section.md
-  - maintainers/scripts/haskell/**/*
-  - pkgs/development/compilers/ghc/**/*
-  - pkgs/development/haskell-modules/**/*
-  - pkgs/development/tools/haskell/**/*
-  - pkgs/test/haskell/**/*
-  - pkgs/top-level/haskell-packages.nix
-  - pkgs/top-level/release-haskell.nix
-
-"6.topic: kernel":
-  - pkgs/build-support/kernel/**/*
-  - pkgs/os-specific/linux/kernel/**/*
-
-"6.topic: lua":
-  - pkgs/development/interpreters/lua-5/**/*
-  - pkgs/development/interpreters/luajit/**/*
-  - pkgs/development/lua-modules/**/*
-  - pkgs/top-level/lua-packages.nix
-
-"6.topic: Lumina DE":
-  - nixos/modules/services/x11/desktop-managers/lumina.nix
-  - pkgs/desktops/lumina/**/*
-
-"6.topic: LXQt":
-  - nixos/modules/services/x11/desktop-managers/lxqt.nix
-  - pkgs/desktops/lxqt/**/*
-
-"6.topic: mate":
-  - nixos/modules/services/x11/desktop-managers/mate.nix
-  - nixos/tests/mate.nix
-  - pkgs/desktops/mate/**/*
-
-"6.topic: nixos":
-  - nixos/**/*
-  - pkgs/os-specific/linux/nixos-rebuild/**/*
-
-"6.topic: nim":
-  - doc/languages-frameworks/nim.section.md
-  - pkgs/development/compilers/nim/*
-  - pkgs/development/nim-packages/**/*
-  - pkgs/top-level/nim-packages.nix
-
-"6.topic: ocaml":
-  - doc/languages-frameworks/ocaml.section.md
-  - pkgs/development/compilers/ocaml/**/*
-  - pkgs/development/compilers/reason/**/*
-  - pkgs/development/ocaml-modules/**/*
-  - pkgs/development/tools/ocaml/**/*
-  - pkgs/top-level/ocaml-packages.nix
-
-"6.topic: pantheon":
-  - nixos/modules/services/desktops/pantheon/**/*
-  - nixos/modules/services/x11/desktop-managers/pantheon.nix
-  - nixos/modules/services/x11/display-managers/lightdm-greeters/pantheon.nix
-  - nixos/tests/pantheon.nix
-  - pkgs/desktops/pantheon/**/*
-
-"6.topic: policy discussion":
-  - .github/**/*
-
-"6.topic: printing":
-  - nixos/modules/services/printing/cupsd.nix
-  - pkgs/misc/cups/**/*
-
-"6.topic: python":
-  - doc/languages-frameworks/python.section.md
-  - pkgs/development/interpreters/python/**/*
-  - pkgs/development/python-modules/**/*
-  - pkgs/top-level/python-packages.nix
-
-"6.topic: qt/kde":
-  - doc/languages-frameworks/qt.section.md
-  - nixos/modules/services/x11/desktop-managers/plasma5.nix
-  - nixos/tests/plasma5.nix
-  - pkgs/applications/kde/**/*
-  - pkgs/desktops/plasma-5/**/*
-  - pkgs/development/libraries/kde-frameworks/**/*
-  - pkgs/development/libraries/qt-5/**/*
-
-"6.topic: ruby":
-  - doc/languages-frameworks/ruby.section.md
-  - pkgs/development/interpreters/ruby/**/*
-  - pkgs/development/ruby-modules/**/*
-
-"6.topic: rust":
-  - doc/languages-frameworks/rust.section.md
-  - pkgs/build-support/rust/**/*
-  - pkgs/development/compilers/rust/**/*
-
-"6.topic: stdenv":
-  - pkgs/stdenv/**/*
-
-"6.topic: steam":
-  - pkgs/games/steam/**/*
-
-"6.topic: systemd":
-  - pkgs/os-specific/linux/systemd/**/*
-  - nixos/modules/system/boot/systemd*/**/*
-
-"6.topic: TeX":
-  - doc/languages-frameworks/texlive.section.md
-  - pkgs/tools/typesetting/tex/**/*
-
-"6.topic: vim":
-  - doc/languages-frameworks/vim.section.md
-  - pkgs/applications/editors/vim/**/*
-  - pkgs/applications/editors/vim/plugins/**/*
-  - nixos/modules/programs/neovim.nix
-  - pkgs/applications/editors/neovim/**/*
-
-"6.topic: vscode":
-  - pkgs/applications/editors/vscode/**/*
-
-"6.topic: xfce":
-  - nixos/doc/manual/configuration/xfce.xml
-  - nixos/modules/services/x11/desktop-managers/xfce.nix
-  - nixos/tests/xfce.nix
-  - pkgs/desktops/xfce/**/*
-
-"8.has: changelog":
-  - nixos/doc/manual/release-notes/**/*
-
-"8.has: documentation":
-  - doc/**/*
-  - nixos/doc/**/*
-
-"8.has: module (update)":
-  - nixos/modules/**/*

.github/stale.yml

@@ -1,9 +0,0 @@
-# Configuration for probot-stale - https://github.com/probot/stale
-daysUntilStale: 180
-daysUntilClose: false
-exemptLabels:
-  - "1.severity: security"
-  - "2.status: never-stale"
-staleLabel: "2.status: stale"
-markComment: false
-closeComment: false

.github/workflows/backport.yml

@@ -1,34 +0,0 @@
-name: Backport
-on:
-  pull_request_target:
-    types: [closed, labeled]
-
-# WARNING:
-# When extending this action, be aware that $GITHUB_TOKEN allows write access to
-# the GitHub repository. This means that it should not evaluate user input in a
-# way that allows code injection.
-
-permissions:
-  contents: read
-
-jobs:
-  backport:
-    permissions:
-      contents: write # for korthout/backport-action to create branch
-      pull-requests: write # for korthout/backport-action to create PR to backport
-    name: Backport Pull Request
-    if: github.repository_owner == 'NixOS' && github.event.pull_request.merged == true && (github.event_name != 'labeled' || startsWith('backport', github.event.label.name))
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
-      - name: Create backport PRs
-        uses: korthout/backport-action@v1.1.0
-        with:
-          # Config README: https://github.com/korthout/backport-action#backport-action
-          pull_description: |-
-            Bot-based backport to `${target_branch}`, triggered by a label in #${pull_number}.
-
-            * [ ] Before merging, ensure that this backport complies with the [Criteria for Backporting](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#criteria-for-backporting-changes).
-              * Even as a non-commiter, if you find that it does not comply, leave a comment.

.github/workflows/basic-eval.yml

@@ -1,29 +0,0 @@
-name: Basic evaluation checks
-
-on:
-  workflow_dispatch
-  # pull_request:
-  #   branches:
-  #    - master
-  #    - release-**
-  # push:
-  #   branches:
-  #    - master
-  #    - release-**
-permissions:
-  contents: read
-
-jobs:
-  tests:
-    runs-on: ubuntu-latest
-    # we don't limit this action to only NixOS repo since the checks are cheap and useful developer feedback
-    steps:
-    - uses: actions/checkout@v3
-    - uses: cachix/install-nix-action@v18
-    - uses: cachix/cachix-action@v12
-      with:
-        # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
-        name: nixpkgs-ci
-        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-    # explicit list of supportedSystems is needed until aarch64-darwin becomes part of the trunk jobset
-    - run: nix-build pkgs/top-level/release.nix -A tarball.nixpkgs-basic-release-checks --arg supportedSystems '[ "aarch64-darwin" "aarch64-linux" "x86_64-linux" "x86_64-darwin"  ]'

.github/workflows/compare-manuals.sh

@@ -1,21 +0,0 @@
-#!/usr/bin/env nix-shell
-#! nix-shell -i bash -p html-tidy
-
-set -euo pipefail
-shopt -s inherit_errexit
-
-normalize() {
-  tidy \
-      --anchor-as-name no \
-      --coerce-endtags no \
-      --escape-scripts no \
-      --fix-backslash no \
-      --fix-style-tags no \
-      --fix-uri no \
-      --indent yes \
-      --wrap 0 \
-      < "$1" \
-      2> /dev/null
-}
-
-diff -U3 <(normalize "$1") <(normalize "$2")

.github/workflows/direct-push.yml

@@ -1,37 +0,0 @@
-name: "Direct Push Warning"
-on:
-  push:
-    branches:
-     - master
-     - release-**
-permissions:
-  contents: read
-
-jobs:
-  build:
-    permissions:
-      contents: write  # for peter-evans/commit-comment to comment on commit
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'NixOS'
-    env:
-      GITHUB_SHA: ${{ github.sha }}
-      GITHUB_REPOSITORY: ${{ github.repository }}
-    steps:
-    - name: Check if commit is a merge commit
-      id: ismerge
-      run: |
-        ISMERGE=$(curl -H 'Accept: application/vnd.github.groot-preview+json' -H "authorization: Bearer ${{ secrets.GITHUB_TOKEN }}" https://api.github.com/repos/${{ env.GITHUB_REPOSITORY }}/commits/${{ env.GITHUB_SHA }}/pulls | jq -r '.[] | select(.merge_commit_sha == "${{ env.GITHUB_SHA }}") | any')
-        echo "ismerge=$ISMERGE" >> $GITHUB_OUTPUT
-    # github events are eventually consistent, so wait until changes propagate to thier DB
-    - run: sleep 60
-      if: steps.ismerge.outputs.ismerge != 'true'
-    - name: Warn if the commit was a direct push
-      if: steps.ismerge.outputs.ismerge != 'true'
-      uses: peter-evans/commit-comment@v2
-      with:
-        body: |
-          @${{ github.actor }}, you pushed a commit directly to master/release branch
-          instead of going through a Pull Request.
-
-          That's highly discouraged beyond the few exceptions listed
-          on https://github.com/NixOS/nixpkgs/issues/118661

.github/workflows/editorconfig.yml

@@ -1,43 +0,0 @@
-name: "Checking EditorConfig"
-
-permissions: read-all
-
-on:
-  # avoids approving first time contributors
-  pull_request_target:
-    branches-ignore:
-      - 'release-**'
-
-jobs:
-  tests:
-    runs-on: ubuntu-latest
-    if: "github.repository_owner == 'NixOS' && !contains(github.event.pull_request.title, '[skip treewide]')"
-    steps:
-    - name: Get list of changed files from PR
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: |
-        gh api \
-          repos/NixOS/nixpkgs/pulls/${{github.event.number}}/files --paginate \
-          | jq '.[] | select(.status != "removed") | .filename' \
-          > "$HOME/changed_files"
-    - name: print list of changed files
-      run: |
-        cat "$HOME/changed_files"
-    - uses: actions/checkout@v3
-      with:
-        # pull_request_target checks out the base branch by default
-        ref: refs/pull/${{ github.event.pull_request.number }}/merge
-    - uses: cachix/install-nix-action@v18
-      with:
-        # nixpkgs commit is pinned so that it doesn't break
-        # editorconfig-checker 2.4.0
-        nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/c473cc8714710179df205b153f4e9fa007107ff9.tar.gz
-    - name: install editorconfig-checker
-      run: nix-env -iA editorconfig-checker -f '<nixpkgs>'
-    - name: Checking EditorConfig
-      run: |
-        cat "$HOME/changed_files" | xargs -r editorconfig-checker -disable-indent-size
-    - if: ${{ failure() }}
-      run: |
-        echo "::error :: Hey! It looks like your changes don't follow our editorconfig settings. Read https://editorconfig.org/#download to configure your editor so you never see this error again."

.github/workflows/labels.yml

@@ -1,24 +0,0 @@
-name: "Label PR"
-
-on:
-  pull_request_target:
-    types: [edited, opened, synchronize, reopened]
-
-# WARNING:
-# When extending this action, be aware that $GITHUB_TOKEN allows some write
-# access to the GitHub API. This means that it should not evaluate user input in
-# a way that allows code injection.
-
-permissions:
-  contents: read
-  pull-requests: write
-
-jobs:
-  labels:
-    runs-on: ubuntu-latest
-    if: "github.repository_owner == 'NixOS' && !contains(github.event.pull_request.title, '[skip treewide]')"
-    steps:
-    - uses: actions/labeler@v4
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        sync-labels: true

.github/workflows/manual-nixos.yml

@@ -1,39 +0,0 @@
-name: "Build NixOS manual"
-
-permissions: read-all
-
-on:
-  pull_request_target:
-    branches:
-      - master
-    paths:
-      - 'nixos/**'
-
-jobs:
-  nixos:
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'NixOS'
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          # pull_request_target checks out the base branch by default
-          ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v18
-        with:
-          # explicitly enable sandbox
-          extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v12
-        with:
-          # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
-          name: nixpkgs-ci
-          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-      - name: Building NixOS manual with DocBook options
-        run: NIX_PATH=nixpkgs=$(pwd) nix-build --option restrict-eval true nixos/release.nix -A manual.x86_64-linux
-      - name: Building NixOS manual with Markdown options
-        run: |
-          export NIX_PATH=nixpkgs=$(pwd)
-          nix-build \
-            --option restrict-eval true \
-            --arg configuration '{ documentation.nixos.options.allowDocBook = false; }' \
-            nixos/release.nix \
-            -A manual.x86_64-linux

.github/workflows/manual-nixpkgs.yml

@@ -1,31 +0,0 @@
-name: "Build Nixpkgs manual"
-
-permissions: read-all
-
-on:
-  pull_request_target:
-    branches:
-      - master
-    paths:
-      - 'doc/**'
-
-jobs:
-  nixpkgs:
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'NixOS'
-    steps:
-      - uses: actions/checkout@v3
-        with:
-          # pull_request_target checks out the base branch by default
-          ref: refs/pull/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v18
-        with:
-          # explicitly enable sandbox
-          extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v12
-        with:
-          # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
-          name: nixpkgs-ci
-          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-      - name: Building Nixpkgs manual
-        run: NIX_PATH=nixpkgs=$(pwd) nix-build --option restrict-eval true pkgs/top-level/release.nix -A manual

.github/workflows/manual-rendering.yml

@@ -1,64 +0,0 @@
-name: "Check NixOS Manual DocBook rendering against MD rendering"
-
-
-on:
-  schedule:
-    # * is a special character in YAML so you have to quote this string
-    # Check every 24 hours
-    - cron:  '0 0 * * *'
-
-permissions:
-  contents: read
-
-jobs:
-  check-rendering-equivalence:
-    permissions:
-      pull-requests: write  # for peter-evans/create-or-update-comment to create or update comment
-    if: github.repository_owner == 'NixOS'
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v18
-        with:
-          # explicitly enable sandbox
-          extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v12
-        with:
-          # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
-          name: nixpkgs-ci
-          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-
-      - name: Build DocBook and MD manuals
-        run: |
-          export NIX_PATH=nixpkgs=$(pwd)
-          nix-build \
-            --option restrict-eval true \
-            -o docbook nixos/release.nix \
-            -A manual.x86_64-linux
-          nix-build \
-            --option restrict-eval true \
-            --arg configuration '{ documentation.nixos.options.allowDocBook = false; }' \
-            -o md nixos/release.nix \
-            -A manual.x86_64-linux
-
-      - name: Compare DocBook and MD manuals
-        id: check
-        run: |
-          export NIX_PATH=nixpkgs=$(pwd)
-          .github/workflows/compare-manuals.sh \
-            docbook/share/doc/nixos/options.html \
-            md/share/doc/nixos/options.html
-
-      # if the manual can't be built we don't want to notify anyone.
-      # while this may temporarily hide rendering failures it will be a lot
-      # less noisy until all nixpkgs pull requests have stopped using
-      # docbook for option docs.
-      - name: Comment on failure
-        uses: peter-evans/create-or-update-comment@v2
-        if: ${{ failure() && steps.check.conclusion == 'failure' }}
-        with:
-          issue-number: 189318
-          body: |
-            Markdown and DocBook manuals do not agree.
-
-            Check https://github.com/NixOS/nixpkgs/actions/runs/${{ github.run_id }} for details.

.github/workflows/no-channel.yml

@@ -1,26 +0,0 @@
-name: "No channel PR"
-
-on:
-  pull_request:
-    branches:
-      - 'nixos-**'
-      - 'nixpkgs-**'
-
-permissions:
-  contents: read
-
-jobs:
-  fail:
-    permissions:
-      contents: none
-    name: "This PR is is targeting a channel branch"
-    runs-on: ubuntu-latest
-    steps:
-    - run: |
-        cat <<EOF
-        The nixos-* and nixpkgs-* branches are pushed to by the channel
-        release script and should not be merged into directly.
-
-        Please target the equivalent release-* branch or master instead.
-        EOF
-        exit 1

.github/workflows/ofborg-pending.yml

@@ -1,33 +0,0 @@
-name: "Set pending OfBorg status"
-on:
-  pull_request_target:
-
-# Sets the ofborg-eval status to "pending" to signal that we are waiting for
-# OfBorg even if it is running late. The status will be overwritten by OfBorg
-# once it starts evaluation.
-
-# WARNING:
-# When extending this action, be aware that $GITHUB_TOKEN allows (restricted) write access to
-# the GitHub repository. This means that it should not evaluate user input in a
-# way that allows code injection.
-
-permissions:
-  contents: read
-
-jobs:
-  action:
-    if: github.repository_owner == 'NixOS'
-    permissions:
-      statuses: write
-    runs-on: ubuntu-latest
-    steps:
-    - name: "Set pending OfBorg status"
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: |
-        curl \
-          -X POST \
-          -H "Accept: application/vnd.github.v3+json" \
-          -H "Authorization: Bearer $GITHUB_TOKEN" \
-          -d '{"context": "ofborg-eval", "state": "pending", "description": "Waiting for OfBorg..."}' \
-          "https://api.github.com/repos/NixOS/nixpkgs/commits/${{ github.event.pull_request.head.sha }}/statuses"

.github/workflows/periodic-merge-24h.yml

@@ -1,59 +0,0 @@
-# This action periodically merges base branches into staging branches.
-# This is done to
-#  * prevent conflicts or rather resolve them early
-#  * make all potential breakage happen on the staging branch
-#  * and make sure that all major rebuilds happen before the staging
-#    branch get’s merged back into its base branch.
-
-name: "Periodic Merges (24h)"
-
-
-on:
-  schedule:
-    # * is a special character in YAML so you have to quote this string
-    # Merge every 24 hours
-    - cron:  '0 0 * * *'
-
-permissions:
-  contents: read
-
-jobs:
-  periodic-merge:
-    permissions:
-      contents: write  # for devmasx/merge-branch to merge branches
-      pull-requests: write  # for peter-evans/create-or-update-comment to create or update comment
-    if: github.repository_owner == 'NixOS'
-    runs-on: ubuntu-latest
-    strategy:
-      # don't fail fast, so that all pairs are tried
-      fail-fast: false
-      # certain branches need to be merged in order, like master->staging-next->staging
-      # and disabling parallelism ensures the order of the pairs below.
-      max-parallel: 1
-      matrix:
-        pairs:
-          - from: master
-            into: haskell-updates
-          - from: release-22.11
-            into: staging-next-22.11
-          - from: staging-next-22.11
-            into: staging-22.11
-    name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
-        uses: devmasx/merge-branch@1.4.0
-        with:
-          type: now
-          from_branch: ${{ matrix.pairs.from }}
-          target_branch: ${{ matrix.pairs.into }}
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Comment on failure
-        uses: peter-evans/create-or-update-comment@v2
-        if: ${{ failure() }}
-        with:
-          issue-number: 105153
-          body: |
-            Periodic merge from `${{ matrix.pairs.from }}` into `${{ matrix.pairs.into }}` has [failed](https://github.com/NixOS/nixpkgs/actions/runs/${{ github.run_id }}).

.github/workflows/periodic-merge-6h.yml

@@ -1,57 +0,0 @@
-# This action periodically merges base branches into staging branches.
-# This is done to
-#  * prevent conflicts or rather resolve them early
-#  * make all potential breakage happen on the staging branch
-#  * and make sure that all major rebuilds happen before the staging
-#    branch get’s merged back into its base branch.
-
-name: "Periodic Merges (6h)"
-
-
-on:
-  schedule:
-    # * is a special character in YAML so you have to quote this string
-    # Merge every 6 hours
-    - cron:  '0 */6 * * *'
-
-permissions:
-  contents: read
-
-jobs:
-  periodic-merge:
-    permissions:
-      contents: write  # for devmasx/merge-branch to merge branches
-      pull-requests: write  # for peter-evans/create-or-update-comment to create or update comment
-    if: github.repository_owner == 'NixOS'
-    runs-on: ubuntu-latest
-    strategy:
-      # don't fail fast, so that all pairs are tried
-      fail-fast: false
-      # certain branches need to be merged in order, like master->staging-next->staging
-      # and disabling parallelism ensures the order of the pairs below.
-      max-parallel: 1
-      matrix:
-        pairs:
-          - from: master
-            into: staging-next
-          - from: staging-next
-            into: staging
-    name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: ${{ matrix.pairs.from }} → ${{ matrix.pairs.into }}
-        uses: devmasx/merge-branch@1.4.0
-        with:
-          type: now
-          from_branch: ${{ matrix.pairs.from }}
-          target_branch: ${{ matrix.pairs.into }}
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Comment on failure
-        uses: peter-evans/create-or-update-comment@v2
-        if: ${{ failure() }}
-        with:
-          issue-number: 105153
-          body: |
-            Periodic merge from `${{ matrix.pairs.from }}` into `${{ matrix.pairs.into }}` has [failed](https://github.com/NixOS/nixpkgs/actions/runs/${{ github.run_id }}).

.github/workflows/update-terraform-providers.yml

@@ -1,57 +0,0 @@
-name: "Update terraform-providers"
-
-on:
-  schedule:
-    - cron: "0 3 * * *"
-  workflow_dispatch:
-
-permissions:
-  contents: read
-
-jobs:
-  tf-providers:
-    permissions:
-      contents: write # for peter-evans/create-pull-request to create branch
-      pull-requests: write # for peter-evans/create-pull-request to create a PR, for peter-evans/create-or-update-comment to create or update comment
-    if: github.repository_owner == 'NixOS' && github.ref == 'refs/heads/master' # ensure workflow_dispatch only runs on master
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - uses: cachix/install-nix-action@v18
-        with:
-          nix_path: nixpkgs=channel:nixpkgs-unstable
-      - name: setup
-        id: setup
-        run: |
-          echo "title=terraform-providers: update $(date -u +"%Y-%m-%d")" >> $GITHUB_OUTPUT
-      - name: update terraform-providers
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git config user.name "github-actions[bot]"
-          echo | nix-shell \
-            maintainers/scripts/update.nix \
-            --argstr commit true \
-            --argstr keep-going true \
-            --argstr max-workers 2 \
-            --argstr path terraform-providers
-      - name: clean repo
-        run: |
-          git clean -f
-      - name: create PR
-        uses: peter-evans/create-pull-request@v4
-        with:
-          body: |
-            Automatic update by [update-terraform-providers](https://github.com/NixOS/nixpkgs/blob/master/.github/workflows/update-terraform-providers.yml) action.
-
-            https://github.com/NixOS/nixpkgs/actions/runs/${{ github.run_id }}
-
-            Check that all providers build with:
-            ```
-            @ofborg build terraform.full
-            ```
-          branch: terraform-providers-update
-          delete-branch: false
-          title: ${{ steps.setup.outputs.title }}
-          token: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -2,32 +2,15 @@
 ,*
 .*.swp
 .*.swo
-.\#*
-\#*\#
-.idea/
-.vscode/
-outputs/
-result-*
 result
-!pkgs/development/python-modules/result
+result-*
 /doc/NEWS.html
 /doc/NEWS.txt
 /doc/manual.html
 /doc/manual.pdf
-/result
-/source/
 .version-suffix
 
 .DS_Store
-.mypy_cache
-__pycache__
 
 /pkgs/development/libraries/qt-5/*/tmp/
-/pkgs/desktops/kde-5/*/tmp/
-/pkgs/development/mobile/androidenv/xml/*
-
-# generated by pkgs/common-updater/update-script.nix
-update-git-commits.txt
-
-# JetBrains IDEA module declaration file
-/nixpkgs.iml
+/pkgs/desktops/kde-5/*/tmp/

.mailmap

@@ -1,14 +0,0 @@
-ajs124 <git@ajs124.de> <ajs124@users.noreply.github.com>
-Anderson Torres <torres.anderson.85@protonmail.com>
-Daniel Løvbrøtte Olsen <me@dandellion.xyz> <daniel.olsen99@gmail.com>
-Fabian Affolter <mail@fabian-affolter.ch> <fabian@affolter-engineering.ch>
-Janne Heß <janne@hess.ooo> <dasJ@users.noreply.github.com>
-Jörg Thalheim <joerg@thalheim.io> <Mic92@users.noreply.github.com>
-Martin Weinelt <hexa@darmstadt.ccc.de> <mweinelt@users.noreply.github.com>
-R. RyanTM <ryantm-bot@ryantm.com>
-Robert Hensing <robert@roberthensing.nl> <roberth@users.noreply.github.com>
-Sandro Jäckel <sandro.jaeckel@gmail.com>
-Sandro Jäckel <sandro.jaeckel@gmail.com> <sandro.jaeckel@sap.com>
-superherointj <5861043+superherointj@users.noreply.github.com>
-Vladimír Čunát <v@cunat.cz> <vcunat@gmail.com>
-Vladimír Čunát <v@cunat.cz> <vladimir.cunat@nic.cz>

.version

@@ -1 +1 @@
-23.05
+18.03

CONTRIBUTING.md

@@ -1,145 +0,0 @@
-# How to contribute
-
-Note: contributing implies licensing those contributions
-under the terms of [COPYING](COPYING), which is an MIT-like license.
-
-## Opening issues
-
-* Make sure you have a [GitHub account](https://github.com/signup/free)
-* Make sure there is no open issue on the topic
-* [Submit a new issue](https://github.com/NixOS/nixpkgs/issues/new/choose) by choosing the kind of topic and fill out the template
-
-## Submitting changes
-
-Read the ["Submitting changes"](https://nixos.org/nixpkgs/manual/#chap-submitting-changes) section of the nixpkgs manual. It explains how to write, test, and iterate on your change, and which branch to base your pull request against.
-
-Below is a short excerpt of some points in there:
-
-* Format the commit messages in the following way:
-
-  ```
-  (pkg-name | nixos/<module>): (from -> to | init at version | refactor | etc)
-
-  (Motivation for change. Link to release notes. Additional information.)
-  ```
-
-  For consistency, there should not be a period at the end of the commit message's summary line (the first line of the commit message).
-
-  Examples:
-
-  * nginx: init at 2.0.1
-  * firefox: 54.0.1 -> 55.0
-    https://www.mozilla.org/en-US/firefox/55.0/releasenotes/
-  * nixos/hydra: add bazBaz option
-
-    Dual baz behavior is needed to do foo.
-  * nixos/nginx: refactor config generation
-
-    The old config generation system used impure shell scripts and could break in specific circumstances (see #1234).
-
-* `meta.description` should:
-  * Be short, just one sentence.
-  * Be capitalized.
-  * Not start with the package name.
-    * More generally, it should not refer to the package name.
-  * Not end with a period (or any punctuation for that matter).
-* `meta.license` must be set and fit the upstream license.
-  * If there is no upstream license, `meta.license` should default to `lib.licenses.unfree`.
-  * If in doubt, try to contact the upstream developers for clarification.
-* `meta.maintainers` must be set.
-
-See the nixpkgs manual for more details on [standard meta-attributes](https://nixos.org/nixpkgs/manual/#sec-standard-meta-attributes).
-
-## Writing good commit messages
-
-In addition to writing properly formatted commit messages, it's important to include relevant information so other developers can later understand *why* a change was made. While this information usually can be found by digging code, mailing list/Discourse archives, pull request discussions or upstream changes, it may require a lot of work.
-
-Package version upgrades usually allow for simpler commit messages, including attribute name, old and new version, as well as a reference to the relevant release notes/changelog. Every once in a while a package upgrade requires more extensive changes, and that subsequently warrants a more verbose message.
-
-Pull requests should not be squash merged in order to keep complete commit messages and GPG signatures intact and must not be when the change doesn't make sense as a single commit.
-This means that, when addressing review comments in order to keep the pull request in an always mergeable status, you will sometimes need to rewrite your branch's history and then force-push it with `git push --force-with-lease`.
-Useful git commands that can help a lot with this are `git commit --patch --amend` and `git rebase --interactive`. For more details consult the git man pages or online resources like [git-rebase.io](https://git-rebase.io/) or [The Pro Git Book](https://git-scm.com/book/en/v2/Git-Tools-Rewriting-History).
-
-## Rebasing between branches (i.e. from master to staging)
-
-From time to time, changes between branches must be rebased, for example, if the
-number of new rebuilds they would cause is too large for the target branch. When
-rebasing, care must be taken to include only the intended changes, otherwise
-many CODEOWNERS will be inadvertently requested for review.  To achieve this,
-rebasing should not be performed directly on the target branch, but on the merge
-base between the current and target branch.
-
-In the following example, we assume that the current branch, called `feature`,
-is based on `master`, and we rebase it onto the merge base between
-`master` and `staging` so that the PR can eventually be retargeted to
-`staging` without causing a mess. The example uses `upstream` as the remote for `NixOS/nixpkgs.git`
-while `origin` is the remote you are pushing to.
-
-
-```console
-# Rebase your commits onto the common merge base
-git rebase --onto upstream/staging... upstream/master
-# Force push your changes
-git push origin feature --force-with-lease
-```
-
-The syntax `upstream/staging...` is equivalent to `upstream/staging...HEAD` and
-stands for the merge base between `upstream/staging` and `HEAD` (hence between
-`upstream/staging` and `upstream/master`).
-
-Then change the base branch in the GitHub PR using the *Edit* button in the upper
-right corner, and switch from `master` to `staging`. *After* the PR has been
-retargeted it might be necessary to do a final rebase onto the target branch, to
-resolve any outstanding merge conflicts.
-
-```console
-# Rebase onto target branch
-git rebase upstream/staging
-# Review and fixup possible conflicts
-git status
-# Force push your changes
-git push origin feature --force-with-lease
-```
-
-## Backporting changes
-
-Follow these steps to backport a change into a release branch in compliance with the [commit policy](https://nixos.org/nixpkgs/manual/#submitting-changes-stable-release-branches).
-
-You can add a label such as `backport release-22.11` to a PR, so that merging it will
-automatically create a backport (via [a GitHub Action](.github/workflows/backport.yml)).
-This also works for PR's that have already been merged, and might take a couple of minutes to trigger.
-
-You can also create the backport manually:
-
-1. Take note of the commits in which the change was introduced into `master` branch.
-2. Check out the target _release branch_, e.g. `release-22.11`. Do not use a _channel branch_ like `nixos-22.11` or `nixpkgs-22.11-darwin`.
-3. Create a branch for your change, e.g. `git checkout -b backport`.
-4. When the reason to backport is not obvious from the original commit message, use `git cherry-pick -xe <original commit>` and add a reason. Otherwise use `git cherry-pick -x <original commit>`. That's fine for minor version updates that only include security and bug fixes, commits that fixes an otherwise broken package or similar. Please also ensure the commits exists on the master branch; in the case of squashed or rebased merges, the commit hash will change and the new commits can be found in the merge message at the bottom of the master pull request.
-5. Push to GitHub and open a backport pull request. Make sure to select the release branch (e.g. `release-22.11`) as the target branch of the pull request, and link to the pull request in which the original change was committed to `master`. The pull request title should be the commit title with the release version as prefix, e.g. `[22.11]`.
-6. When the backport pull request is merged and you have the necessary privileges you can also replace the label `9.needs: port to stable` with `8.has: port to stable` on the original pull request. This way maintainers can keep track of missing backports easier.
-
-## Criteria for Backporting changes
-
-Anything that does not cause user or downstream dependency regressions can be backported. This includes:
-- New Packages / Modules
-- Security / Patch updates
-- Version updates which include new functionality (but no breaking changes)
-- Services which require a client to be up-to-date regardless. (E.g. `spotify`, `steam`, or `discord`)
-- Security critical applications (E.g. `firefox`)
-
-## Generating 23.05 Release Notes
-<!--
-note: title unchanged even though we don't need regeneration because extant
-PRs will link here. definitely change the title for 23.11 though.
--->
-
-Documentation in nixpkgs is transitioning to a markdown-centric workflow. In the past release notes required a translation step to convert from markdown to a compatible docbook document, but this is no longer necessary.
-
-Steps for updating 23.05 Release notes:
-
-1. Edit `nixos/doc/manual/release-notes/rl-2305.section.md` with the desired changes
-2. Commit changes to `rl-2305.section.md`.
-
-## Reviewing contributions
-
-See the nixpkgs manual for more details on how to [Review contributions](https://nixos.org/nixpkgs/manual/#chap-reviewing-contributions).

COPYING

@@ -1,4 +1,4 @@
-Copyright (c) 2003-2023 Eelco Dolstra and the Nixpkgs/NixOS contributors
+Copyright (c) 2003-2018 Eelco Dolstra and the Nixpkgs/NixOS contributors
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
@@ -18,3 +18,12 @@ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+======================================================================
+
+Note: the license above does not apply to the packages built by the
+Nix Packages collection, merely to the package descriptions (i.e., Nix
+expressions, build scripts, etc.).  It also might not apply to patches
+included in Nixpkgs, which may be derivative works of the packages to
+which they apply.  The aforementioned artifacts are all covered by the
+licenses of the respective packages.

README.md

@@ -1,119 +1,41 @@
-<p align="center">
-  <a href="https://nixos.org#gh-light-mode-only">
-    <img src="https://raw.githubusercontent.com/NixOS/nixos-homepage/master/logo/nixos-hires.png" width="500px" alt="NixOS logo"/>
-  </a>
-  <a href="https://nixos.org#gh-dark-mode-only">
-    <img src="https://raw.githubusercontent.com/NixOS/nixos-artwork/master/logo/nixos-white.png" width="500px" alt="NixOS logo"/>
-  </a>
-</p>
+[<img src="https://nixos.org/logo/nixos-hires.png" width="500px" alt="logo" />](https://nixos.org/nixos)
 
-<p align="center">
-  <a href="https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md"><img src="https://img.shields.io/github/contributors-anon/NixOS/nixpkgs" alt="Contributors badge" /></a>
-  <a href="https://opencollective.com/nixos"><img src="https://opencollective.com/nixos/tiers/supporter/badge.svg?label=supporters&color=brightgreen" alt="Open Collective supporters" /></a>
-</p>
+[![Code Triagers Badge](https://www.codetriage.com/nixos/nixpkgs/badges/users.svg)](https://www.codetriage.com/nixos/nixpkgs)
 
-[Nixpkgs](https://github.com/nixos/nixpkgs) is a collection of over
-80,000 software packages that can be installed with the
-[Nix](https://nixos.org/nix/) package manager. It also implements
-[NixOS](https://nixos.org/nixos/), a purely-functional Linux distribution.
+Nixpkgs is a collection of packages for the [Nix](https://nixos.org/nix/) package
+manager. It is periodically built and tested by the [Hydra](https://hydra.nixos.org/)
+build daemon as so-called channels. To get channel information via git, add
+[nixpkgs-channels](https://github.com/NixOS/nixpkgs-channels.git) as a remote:
 
-# Manuals
+```
+% git remote add channels git://github.com/NixOS/nixpkgs-channels.git
+```
 
-* [NixOS Manual](https://nixos.org/nixos/manual) - how to install, configure, and maintain a purely-functional Linux distribution
-* [Nixpkgs Manual](https://nixos.org/nixpkgs/manual/) - contributing to Nixpkgs and using programming-language-specific Nix expressions
-* [Nix Package Manager Manual](https://nixos.org/nix/manual) - how to write Nix expressions (programs), and how to use Nix command line tools
+For stability and maximum binary package support, it is recommended to maintain
+custom changes on top of one of the channels, e.g. `nixos-18.03` for the latest
+release and `nixos-unstable` for the latest successful build of master:
 
-# Community
+```
+% git remote update channels
+% git rebase channels/nixos-18.03
+```
 
-* [Discourse Forum](https://discourse.nixos.org/)
-* [Matrix Chat](https://matrix.to/#/#community:nixos.org)
-* [NixOS Weekly](https://weekly.nixos.org/)
-* [Community-maintained wiki](https://nixos.wiki/)
-* [Community-maintained list of ways to get in touch](https://nixos.wiki/wiki/Get_In_Touch#Chat) (Discord, Telegram, IRC, etc.)
+For pull-requests, please rebase onto nixpkgs `master`.
 
-# Other Project Repositories
-
-The sources of all official Nix-related projects are in the [NixOS
-organization on GitHub](https://github.com/NixOS/). Here are some of
-the main ones:
-
-* [Nix](https://github.com/NixOS/nix) - the purely functional package manager
-* [NixOps](https://github.com/NixOS/nixops) - the tool to remotely deploy NixOS machines
-* [nixos-hardware](https://github.com/NixOS/nixos-hardware) - NixOS profiles to optimize settings for different hardware
-* [Nix RFCs](https://github.com/NixOS/rfcs) - the formal process for making substantial changes to the community
-* [NixOS homepage](https://github.com/NixOS/nixos-homepage) - the [NixOS.org](https://nixos.org) website
-* [hydra](https://github.com/NixOS/hydra) - our continuous integration system
-* [NixOS Artwork](https://github.com/NixOS/nixos-artwork) - NixOS artwork
-
-# Continuous Integration and Distribution
-
-Nixpkgs and NixOS are built and tested by our continuous integration
-system, [Hydra](https://hydra.nixos.org/).
+[NixOS](https://nixos.org/nixos/) Linux distribution source code is located inside
+`nixos/` folder.
 
+* [NixOS installation instructions](https://nixos.org/nixos/manual/#ch-installation)
+* [Documentation (Nix Expression Language chapter)](https://nixos.org/nix/manual/#ch-expression-language)
+* [Manual (How to write packages for Nix)](https://nixos.org/nixpkgs/manual/)
+* [Manual (NixOS)](https://nixos.org/nixos/manual/)
+* [Community maintained wiki](https://nixos.wiki/)
 * [Continuous package builds for unstable/master](https://hydra.nixos.org/jobset/nixos/trunk-combined)
-* [Continuous package builds for the NixOS 22.11 release](https://hydra.nixos.org/jobset/nixos/release-22.11)
+* [Continuous package builds for 18.03 release](https://hydra.nixos.org/jobset/nixos/release-18.03)
 * [Tests for unstable/master](https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents)
-* [Tests for the NixOS 22.11 release](https://hydra.nixos.org/job/nixos/release-22.11/tested#tabs-constituents)
+* [Tests for 18.03 release](https://hydra.nixos.org/job/nixos/release-18.03/tested#tabs-constituents)
 
-Artifacts successfully built with Hydra are published to cache at
-https://cache.nixos.org/. When successful build and test criteria are
-met, the Nixpkgs expressions are distributed via [Nix
-channels](https://nixos.org/manual/nix/stable/package-management/channels.html).
+Communication:
 
-# Contributing
-
-Nixpkgs is among the most active projects on GitHub. While thousands
-of open issues and pull requests might seem a lot at first, it helps
-consider it in the context of the scope of the project. Nixpkgs
-describes how to build tens of thousands of pieces of software and implements a
-Linux distribution. The [GitHub Insights](https://github.com/NixOS/nixpkgs/pulse)
-page gives a sense of the project activity.
-
-Community contributions are always welcome through GitHub Issues and
-Pull Requests. When pull requests are made, our tooling automation bot,
-[OfBorg](https://github.com/NixOS/ofborg) will perform various checks
-to help ensure expression quality.
-
-The *Nixpkgs maintainers* are people who have assigned themselves to
-maintain specific individual packages. We encourage people who care
-about a package to assign themselves as a maintainer. When a pull
-request is made against a package, OfBorg will notify the appropriate
-maintainer(s). The *Nixpkgs committers* are people who have been given
-permission to merge.
-
-Most contributions are based on and merged into these branches:
-
-* `master` is the main branch where all small contributions go
-* `staging` is branched from master, changes that have a big impact on
-  Hydra builds go to this branch
-* `staging-next` is branched from staging and only fixes to stabilize
-  and security fixes with a big impact on Hydra builds should be
-  contributed to this branch. This branch is merged into master when
-  deemed of sufficiently high quality
-
-For more information about contributing to the project, please visit
-the [contributing page](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md).
-
-# Donations
-
-The infrastructure for NixOS and related projects is maintained by a
-nonprofit organization, the [NixOS
-Foundation](https://nixos.org/nixos/foundation.html). To ensure the
-continuity and expansion of the NixOS infrastructure, we are looking
-for donations to our organization.
-
-You can donate to the NixOS foundation through [SEPA bank
-transfers](https://nixos.org/donate.html) or by using Open Collective:
-
-<a href="https://opencollective.com/nixos#support"><img src="https://opencollective.com/nixos/tiers/supporter.svg?width=890" /></a>
-
-# License
-
-Nixpkgs is licensed under the [MIT License](COPYING).
-
-Note: MIT license does not apply to the packages built by Nixpkgs,
-merely to the files in this repository (the Nix expressions, build
-scripts, NixOS modules, etc.). It also might not apply to patches
-included in Nixpkgs, which may be derivative works of the packages to
-which they apply. The aforementioned artifacts are all covered by the
-licenses of the respective packages.
+* [Mailing list](https://groups.google.com/forum/#!forum/nix-devel)
+* [IRC - #nixos on freenode.net](irc://irc.freenode.net/#nixos)

default.nix

@@ -6,21 +6,12 @@ if ! builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.
 
     This version of Nixpkgs requires Nix >= ${requiredVersion}, please upgrade:
 
-    - If you are running NixOS, `nixos-rebuild' can be used to upgrade your system.
-
-    - Alternatively, with Nix > 2.0 `nix upgrade-nix' can be used to imperatively
-      upgrade Nix. You may use `nix-env --version' to check which version you have.
+    - If you are running NixOS, use `nixos-rebuild' to upgrade your system.
 
     - If you installed Nix using the install script (https://nixos.org/nix/install),
       it is safe to upgrade by running it again:
 
-          curl -L https://nixos.org/nix/install | sh
-
-    For more information, please see the NixOS release notes at
-    https://nixos.org/nixos/manual or locally at
-    ${toString ./nixos/doc/manual/release-notes}.
-
-    If you need further help, see https://nixos.org/nixos/support.html
+          curl https://nixos.org/nix/install | sh
   ''
 
 else

doc/.gitignore

@@ -1,8 +1,6 @@
 *.chapter.xml
 *.section.xml
 .version
-functions/library/generated
-functions/library/locations.xml
-highlightjs
-manual-full.xml
 out
+manual-full.xml
+highlightjs

doc/Makefile

@@ -1,20 +1,4 @@
-MD_TARGETS=$(addsuffix .xml, $(basename $(shell find . -type f -regex '.*\.md$$' -not -name README.md)))
-
-PANDOC ?= pandoc
-
-pandoc_media_dir = media
-# NOTE: Keep in sync with conversion script (/maintainers/scripts/db-to-md.sh).
-# TODO: Remove raw-attribute when we can get rid of DocBook altogether.
-pandoc_commonmark_enabled_extensions = +attributes+fenced_divs+footnotes+bracketed_spans+definition_lists+pipe_tables+raw_attribute
-# Not needed:
-# - docbook-reader/citerefentry-to-rst-role.lua (only relevant for DocBook → MarkDown/rST/MyST)
-pandoc_flags = --extract-media=$(pandoc_media_dir) \
-	--lua-filter=$(PANDOC_LUA_FILTERS_DIR)/diagram-generator.lua \
-	--lua-filter=build-aux/pandoc-filters/myst-reader/roles.lua \
-	--lua-filter=$(PANDOC_LINK_MANPAGES_FILTER) \
-	--lua-filter=build-aux/pandoc-filters/docbook-writer/rst-roles.lua \
-	--lua-filter=build-aux/pandoc-filters/docbook-writer/labelless-link-is-xref.lua \
-	-f commonmark$(pandoc_commonmark_enabled_extensions)+smart
+MD_TARGETS=$(addsuffix .xml, $(basename $(wildcard ./*.md ./**/*.md)))
 
 .PHONY: all
 all: validate format out/html/index.html out/epub/manual.epub
@@ -24,11 +8,9 @@ debug:
 	nix-shell --run "xmloscopy --docbook5 ./manual.xml ./manual-full.xml"
 
 .PHONY: format
-format: doc-support/result
-	find . -iname '*.xml' -type f | while read f; do \
-		echo $$f ;\
-		xmlformat --config-file "doc-support/result/xmlformat.conf" -i $$f ;\
-	done
+format:
+	find . -iname '*.xml' -type f -print0 | xargs -0 -I{} -n1 \
+		xmlformat --config-file "$$XMLFORMAT_CONFIG" -i {}
 
 .PHONY: fix-misc-xml
 fix-misc-xml:
@@ -37,80 +19,82 @@ fix-misc-xml:
 
 .PHONY: clean
 clean:
-	rm -f ${MD_TARGETS} doc-support/result .version manual-full.xml functions/library/locations.xml functions/library/generated
-	rm -rf ./out/ ./highlightjs ./media
+	rm -f ${MD_TARGETS} .version manual-full.xml
+	rm -rf ./out/ ./highlightjs
 
 .PHONY: validate
-validate: manual-full.xml doc-support/result
-	jing doc-support/result/docbook.rng manual-full.xml
+validate: manual-full.xml
+	jing "$$RNG" manual-full.xml
 
-out/html/index.html: doc-support/result manual-full.xml style.css highlightjs
+out/html/index.html: manual-full.xml style.css highlightjs
 	mkdir -p out/html
-	xsltproc \
+	xsltproc ${xsltFlags} \
 		--nonet --xinclude \
 		--output $@ \
-		doc-support/result/xhtml.xsl \
+		"$$XSL/docbook/xhtml/docbook.xsl" \
 		./manual-full.xml
 
 	mkdir -p out/html/highlightjs/
 	cp -r highlightjs out/html/
 
-	cp -r $(pandoc_media_dir) out/html/
 	cp ./overrides.css out/html/
 	cp ./style.css out/html/style.css
 
 	mkdir -p out/html/images/callouts
-	cp doc-support/result/xsl/docbook/images/callouts/*.svg out/html/images/callouts/
+	cp "$$XSL/docbook/images/callouts/"*.svg out/html/images/callouts/
 	chmod u+w -R out/html/
 
 out/epub/manual.epub: manual-full.xml
 	mkdir -p out/epub/scratch
-	xsltproc --nonet \
+	xsltproc ${xsltFlags} --nonet \
 		--output out/epub/scratch/ \
-		doc-support/result/epub.xsl \
+		"$$XSL/docbook/epub/docbook.xsl" \
 		./manual-full.xml
 
-	cp -r $(pandoc_media_dir) out/epub/scratch/OEBPS
 	cp ./overrides.css out/epub/scratch/OEBPS
 	cp ./style.css out/epub/scratch/OEBPS
 	mkdir -p out/epub/scratch/OEBPS/images/callouts/
-	cp doc-support/result/xsl/docbook/images/callouts/*.svg out/epub/scratch/OEBPS/images/callouts/
+	cp "$$XSL/docbook/images/callouts/"*.svg out/epub/scratch/OEBPS/images/callouts/
 	echo "application/epub+zip" > mimetype
 	zip -0Xq "out/epub/manual.epub" mimetype
 	rm mimetype
 	cd "out/epub/scratch/" && zip -Xr9D "../manual.epub" *
 	rm -rf "out/epub/scratch/"
 
-highlightjs: doc-support/result
+highlightjs:
 	mkdir -p highlightjs
-	cp -r doc-support/result/highlightjs/highlight.pack.js highlightjs/
-	cp -r doc-support/result/highlightjs/LICENSE highlightjs/
-	cp -r doc-support/result/highlightjs/mono-blue.css highlightjs/
-	cp -r doc-support/result/highlightjs/loader.js highlightjs/
+	cp -r "$$HIGHLIGHTJS/highlight.pack.js" highlightjs/
+	cp -r "$$HIGHLIGHTJS/LICENSE" highlightjs/
+	cp -r "$$HIGHLIGHTJS/mono-blue.css" highlightjs/
+	cp -r "$$HIGHLIGHTJS/loader.js" highlightjs/
 
 
-manual-full.xml: ${MD_TARGETS} .version functions/library/locations.xml functions/library/generated *.xml **/*.xml **/**/*.xml
+manual-full.xml: ${MD_TARGETS} .version *.xml
 	xmllint --nonet --xinclude --noxincludenode manual.xml --output manual-full.xml
 
-.version: doc-support/result
-	ln -rfs ./doc-support/result/version .version
-
-doc-support/result: doc-support/default.nix
-	(cd doc-support; nix-build)
-
-functions/library/locations.xml: doc-support/result
-	ln -rfs ./doc-support/result/function-locations.xml functions/library/locations.xml
-
-functions/library/generated: doc-support/result
-	ln -rfs ./doc-support/result/function-docs functions/library/generated
+.version:
+	nix-instantiate --eval \
+		-E '(import ../lib).nixpkgsVersion' > .version
 
 %.section.xml: %.section.md
-	$(PANDOC) $^ -t docbook \
-		$(pandoc_flags) \
-		-o $@
+	pandoc $^ -w docbook+smart \
+		-f markdown+smart \
+	  | sed -e 's|<ulink url=|<link xlink:href=|' \
+	      -e 's|</ulink>|</link>|' \
+	      -e 's|<sect. id=|<section xml:id=|' \
+	      -e 's|</sect[0-9]>|</section>|' \
+	      -e '1s| id=| xml:id=|' \
+	      -e '1s|\(<[^ ]* \)|\1xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink" |' \
+	| cat  > $@
 
 %.chapter.xml: %.chapter.md
-	$(PANDOC) $^ -t docbook \
+	pandoc $^ -w docbook+smart \
 		--top-level-division=chapter \
-		$(pandoc_flags) \
-		-o $@
+		-f markdown+smart \
+	  | sed -e 's|<ulink url=|<link xlink:href=|' \
+	      -e 's|</ulink>|</link>|' \
+	      -e 's|<sect. id=|<section xml:id=|' \
+	      -e 's|</sect[0-9]>|</section>|' \
+	      -e '1s| id=| xml:id=|' \
+	      -e '1s|\(<[^ ]* \)|\1|' \
+	| cat  > $@

doc/README.md

@@ -1,12 +0,0 @@
-
-# Nixpkgs/doc
-
-This directory houses the sources files for the Nixpkgs manual.
-
-You can find the [rendered documentation for Nixpkgs `unstable` on nixos.org](https://nixos.org/manual/nixpkgs/unstable/).
-
-[Docs for Nixpkgs stable](https://nixos.org/manual/nixpkgs/stable/) are also available.
-
-If you want to contribute to the documentation, [here's how to do it](https://nixos.org/manual/nixpkgs/unstable/#chap-contributing).
-
-If you're only getting started with Nix, go to [nixos.org/learn](https://nixos.org/learn).

doc/build-aux/pandoc-filters/docbook-reader/citerefentry-to-rst-role.lua

@@ -1,23 +0,0 @@
---[[
-Converts Code AST nodes produced by pandoc’s DocBook reader
-from citerefentry elements into AST for corresponding role
-for reStructuredText.
-
-We use subset of MyST syntax (CommonMark with features from rST)
-so let’s use the rST AST for rST features.
-
-Reference: https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html#role-manpage
-]]
-
-function Code(elem)
-  elem.classes = elem.classes:map(function (x)
-    if x == 'citerefentry' then
-      elem.attributes['role'] = 'manpage'
-      return 'interpreted-text'
-    else
-      return x
-    end
-  end)
-
-  return elem
-end

doc/build-aux/pandoc-filters/docbook-writer/labelless-link-is-xref.lua

@@ -1,34 +0,0 @@
---[[
-Converts Link AST nodes with empty label to DocBook xref elements.
-
-This is a temporary script to be able use cross-references conveniently
-using syntax taken from MyST, while we still use docbook-xsl
-for generating the documentation.
-
-Reference: https://myst-parser.readthedocs.io/en/latest/using/syntax.html#targets-and-cross-referencing
-]]
-
-local function starts_with(start, str)
-  return str:sub(1, #start) == start
-end
-
-local function escape_xml_arg(arg)
-  amps = arg:gsub('&', '&')
-  amps_quotes = amps:gsub('"', '"')
-  amps_quotes_lt = amps_quotes:gsub('<', '&lt;')
-
-  return amps_quotes_lt
-end
-
-function Link(elem)
-  has_no_content = #elem.content == 0
-  targets_anchor = starts_with('#', elem.target)
-  has_no_attributes = elem.title == '' and elem.identifier == '' and #elem.classes == 0 and #elem.attributes == 0
-
-  if has_no_content and targets_anchor and has_no_attributes then
-    -- xref expects idref without the pound-sign
-    target_without_hash = elem.target:sub(2, #elem.target)
-
-    return pandoc.RawInline('docbook', '<xref linkend="' .. escape_xml_arg(target_without_hash) .. '" />')
-  end
-end

doc/build-aux/pandoc-filters/docbook-writer/rst-roles.lua

@@ -1,44 +0,0 @@
---[[
-Converts AST for reStructuredText roles into corresponding
-DocBook elements.
-
-Currently, only a subset of roles is supported.
-
-Reference:
-  List of roles:
-    https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html
-  manpage:
-    https://tdg.docbook.org/tdg/5.1/citerefentry.html
-  file:
-    https://tdg.docbook.org/tdg/5.1/filename.html
-]]
-
-function Code(elem)
-  if elem.classes:includes('interpreted-text') then
-    local tag = nil
-    local content = elem.text
-    if elem.attributes['role'] == 'manpage' then
-      tag = 'citerefentry'
-      local title, volnum = content:match('^(.+)%((%w+)%)$')
-      if title == nil then
-        -- No volnum in parentheses.
-        title = content
-      end
-      content = '<refentrytitle>' .. title .. '</refentrytitle>' .. (volnum ~= nil and ('<manvolnum>' .. volnum .. '</manvolnum>') or '')
-    elseif elem.attributes['role'] == 'file' then
-      tag = 'filename'
-    elseif elem.attributes['role'] == 'command' then
-      tag = 'command'
-    elseif elem.attributes['role'] == 'option' then
-      tag = 'option'
-    elseif elem.attributes['role'] == 'var' then
-      tag = 'varname'
-    elseif elem.attributes['role'] == 'env' then
-      tag = 'envar'
-    end
-
-    if tag ~= nil then
-      return pandoc.RawInline('docbook', '<' .. tag .. '>' .. content .. '</' .. tag .. '>')
-    end
-  end
-end

doc/build-aux/pandoc-filters/link-manpages.nix

@@ -1,28 +0,0 @@
-{ pkgs ? import ../../.. {} }:
-let
-  inherit (pkgs) lib;
-  manpageURLs = builtins.fromJSON (builtins.readFile (pkgs.path + "/doc/manpage-urls.json"));
-in pkgs.writeText "link-manpages.lua" ''
-  --[[
-  Adds links to known man pages that aren't already in a link.
-  ]]
-
-  local manpage_urls = {
-  ${lib.concatStringsSep "\n" (lib.mapAttrsToList (man: url:
-    "  [${builtins.toJSON man}] = ${builtins.toJSON url},") manpageURLs)}
-  }
-
-  traverse = 'topdown'
-
-  -- Returning false as the second value aborts processing of child elements.
-  function Link(elem)
-    return elem, false
-  end
-
-  function Code(elem)
-    local is_man_role = elem.classes:includes('interpreted-text') and elem.attributes['role'] == 'manpage'
-    if is_man_role and manpage_urls[elem.text] ~= nil then
-      return pandoc.Link(elem, manpage_urls[elem.text]), false
-    end
-  end
-''

doc/build-aux/pandoc-filters/myst-reader/roles.lua

@@ -1,36 +0,0 @@
---[[
-Replaces Str AST nodes containing {role}, followed by a Code node
-by a Code node with attrs that would be produced by rST reader
-from the role syntax.
-
-This is to emulate MyST syntax in Pandoc.
-(MyST is a CommonMark flavour with rST features mixed in.)
-
-Reference: https://myst-parser.readthedocs.io/en/latest/syntax/syntax.html#roles-an-in-line-extension-point
-]]
-
-function Inlines(inlines)
-  for i = #inlines-1,1,-1 do
-    local first = inlines[i]
-    local second = inlines[i+1]
-    local correct_tags = first.tag == 'Str' and second.tag == 'Code'
-    if correct_tags then
-      -- docutils supports alphanumeric strings separated by [-._:]
-      -- We are slightly more liberal for simplicity.
-      -- Allow preceding punctuation (eg '('), otherwise '({file}`...`)'
-      -- does not match. Also allow anything followed by a non-breaking space
-      -- since pandoc emits those after certain abbreviations (e.g. e.g.).
-      local prefix, role = first.text:match('^(.*){([-._+:%w]+)}$')
-      if role ~= nil and (prefix == '' or prefix:match("^.*[%p ]$") ~= nil) then
-        if prefix == '' then
-          inlines:remove(i)
-        else
-          first.text = prefix
-        end
-        second.attributes['role'] = role
-        second.classes:insert('interpreted-text')
-      end
-    end
-  end
-  return inlines
-end

doc/build-aux/pandoc-filters/myst-writer/roles.lua

@@ -1,25 +0,0 @@
---[[
-Replaces Code nodes with attrs that would be produced by rST reader
-from the role syntax by a Str AST node containing {role}, followed by a Code node.
-
-This is to emulate MyST syntax in Pandoc.
-(MyST is a CommonMark flavour with rST features mixed in.)
-
-Reference: https://myst-parser.readthedocs.io/en/latest/syntax/syntax.html#roles-an-in-line-extension-point
-]]
-
-function Code(elem)
-  local role = elem.attributes['role']
-
-  if elem.classes:includes('interpreted-text') and role ~= nil then
-    elem.classes = elem.classes:filter(function (c)
-      return c ~= 'interpreted-text'
-    end)
-    elem.attributes['role'] = nil
-
-    return {
-      pandoc.Str('{' .. role .. '}'),
-      elem,
-    }
-  end
-end

doc/builders/fetchers.chapter.md

@@ -1,192 +0,0 @@
-# Fetchers {#chap-pkgs-fetchers}
-
-Building software with Nix often requires downloading source code and other files from the internet.
-`nixpkgs` provides *fetchers* for different protocols and services. Fetchers are functions that simplify downloading files.
-
-## Caveats
-
-Fetchers create [fixed output derivations](https://nixos.org/manual/nix/stable/#fixed-output-drvs) from downloaded files.
-Nix can reuse the downloaded files via the hash of the resulting derivation.
-
-The fact that the hash belongs to the Nix derivation output and not the file itself can lead to confusion.
-For example, consider the following fetcher:
-
-```nix
-fetchurl {
-  url = "http://www.example.org/hello-1.0.tar.gz";
-  hash = "sha256-lTeyxzJNQeMdu1IVdovNMtgn77jRIhSybLdMbTkf2Ww=";
-};
-```
-
-A common mistake is to update a fetcher’s URL, or a version parameter, without updating the hash.
-
-```nix
-fetchurl {
-  url = "http://www.example.org/hello-1.1.tar.gz";
-  hash = "sha256-lTeyxzJNQeMdu1IVdovNMtgn77jRIhSybLdMbTkf2Ww=";
-};
-```
-
-**This will reuse the old contents**.
-Remember to invalidate the hash argument, in this case by setting the `hash` attribute to an empty string.
-
-```nix
-fetchurl {
-  url = "http://www.example.org/hello-1.1.tar.gz";
-  hash = "";
-};
-```
-
-Use the resulting error message to determine the correct hash.
-
-```
-error: hash mismatch in fixed-output derivation '/path/to/my.drv':
-         specified: sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
-            got:    sha256-lTeyxzJNQeMdu1IVdovNMtgn77jRIhSybLdMbTkf2Ww=
-```
-
-A similar problem arises while testing changes to a fetcher's implementation. If the output of the derivation already exists in the Nix store, test failures can go undetected. The [`invalidateFetcherByDrvHash`](#tester-invalidateFetcherByDrvHash) function helps prevent reusing cached derivations.
-
-## `fetchurl` and `fetchzip` {#fetchurl}
-
-Two basic fetchers are `fetchurl` and `fetchzip`. Both of these have two required arguments, a URL and a hash. The hash is typically `hash`, although many more hash algorithms are supported. Nixpkgs contributors are currently recommended to use `hash`. This hash will be used by Nix to identify your source. A typical usage of `fetchurl` is provided below.
-
-```nix
-{ stdenv, fetchurl }:
-
-stdenv.mkDerivation {
-  name = "hello";
-  src = fetchurl {
-    url = "http://www.example.org/hello.tar.gz";
-    hash = "sha256-BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB=";
-  };
-}
-```
-
-The main difference between `fetchurl` and `fetchzip` is in how they store the contents. `fetchurl` will store the unaltered contents of the URL within the Nix store. `fetchzip` on the other hand, will decompress the archive for you, making files and directories directly accessible in the future. `fetchzip` can only be used with archives. Despite the name, `fetchzip` is not limited to .zip files and can also be used with any tarball.
-
-## `fetchpatch` {#fetchpatch}
-
-`fetchpatch` works very similarly to `fetchurl` with the same arguments expected. It expects patch files as a source and performs normalization on them before computing the checksum. For example, it will remove comments or other unstable parts that are sometimes added by version control systems and can change over time.
-
-- `relative`: Similar to using `git-diff`'s `--relative` flag, only keep changes inside the specified directory, making paths relative to it.
-- `stripLen`: Remove the first `stripLen` components of pathnames in the patch.
-- `extraPrefix`: Prefix pathnames by this string.
-- `excludes`: Exclude files matching these patterns (applies after the above arguments).
-- `includes`: Include only files matching these patterns (applies after the above arguments).
-- `revert`: Revert the patch.
-
-Note that because the checksum is computed after applying these effects, using or modifying these arguments will have no effect unless the `hash` argument is changed as well.
-
-
-Most other fetchers return a directory rather than a single file.
-
-## `fetchsvn` {#fetchsvn}
-
-Used with Subversion. Expects `url` to a Subversion directory, `rev`, and `hash`.
-
-## `fetchgit` {#fetchgit}
-
-Used with Git. Expects `url` to a Git repo, `rev`, and `hash`. `rev` in this case can be full the git commit id (SHA1 hash) or a tag name like `refs/tags/v1.0`.
-
-Additionally, the following optional arguments can be given: `fetchSubmodules = true` makes `fetchgit` also fetch the submodules of a repository. If `deepClone` is set to true, the entire repository is cloned as opposing to just creating a shallow clone. `deepClone = true` also implies `leaveDotGit = true` which means that the `.git` directory of the clone won't be removed after checkout.
-
-If only parts of the repository are needed, `sparseCheckout` can be used. This will prevent git from fetching unnecessary blobs from server, see [git sparse-checkout](https://git-scm.com/docs/git-sparse-checkout) for more information:
-
-```nix
-{ stdenv, fetchgit }:
-
-stdenv.mkDerivation {
-  name = "hello";
-  src = fetchgit {
-    url = "https://...";
-    sparseCheckout = [
-      "directory/to/be/included"
-      "another/directory"
-    ];
-    hash = "sha256-AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=";
-  };
-}
-```
-
-## `fetchfossil` {#fetchfossil}
-
-Used with Fossil. Expects `url` to a Fossil archive, `rev`, and `hash`.
-
-## `fetchcvs` {#fetchcvs}
-
-Used with CVS. Expects `cvsRoot`, `tag`, and `hash`.
-
-## `fetchhg` {#fetchhg}
-
-Used with Mercurial. Expects `url`, `rev`, and `hash`.
-
-A number of fetcher functions wrap part of `fetchurl` and `fetchzip`. They are mainly convenience functions intended for commonly used destinations of source code in Nixpkgs. These wrapper fetchers are listed below.
-
-## `fetchFromGitea` {#fetchfromgitea}
-
-`fetchFromGitea` expects five arguments. `domain` is the gitea server name. `owner` is a string corresponding to the Gitea user or organization that controls this repository. `repo` corresponds to the name of the software repository. These are located at the top of every Gitea HTML page as `owner`/`repo`. `rev` corresponds to the Git commit hash or tag (e.g `v1.0`) that will be downloaded from Git. Finally, `hash` corresponds to the hash of the extracted directory. Again, other hash algorithms are also available but `hash` is currently preferred.
-
-## `fetchFromGitHub` {#fetchfromgithub}
-
-`fetchFromGitHub` expects four arguments. `owner` is a string corresponding to the GitHub user or organization that controls this repository. `repo` corresponds to the name of the software repository. These are located at the top of every GitHub HTML page as `owner`/`repo`. `rev` corresponds to the Git commit hash or tag (e.g `v1.0`) that will be downloaded from Git. Finally, `hash` corresponds to the hash of the extracted directory. Again, other hash algorithms are also available, but `hash` is currently preferred.
-
-`fetchFromGitHub` uses `fetchzip` to download the source archive generated by GitHub for the specified revision. If `leaveDotGit`, `deepClone` or `fetchSubmodules` are set to `true`, `fetchFromGitHub` will use `fetchgit` instead. Refer to its section for documentation of these options.
-
-## `fetchFromGitLab` {#fetchfromgitlab}
-
-This is used with GitLab repositories. The arguments expected are very similar to `fetchFromGitHub` above.
-
-## `fetchFromGitiles` {#fetchfromgitiles}
-
-This is used with Gitiles repositories. The arguments expected are similar to `fetchgit`.
-
-## `fetchFromBitbucket` {#fetchfrombitbucket}
-
-This is used with BitBucket repositories. The arguments expected are very similar to fetchFromGitHub above.
-
-## `fetchFromSavannah` {#fetchfromsavannah}
-
-This is used with Savannah repositories. The arguments expected are very similar to `fetchFromGitHub` above.
-
-## `fetchFromRepoOrCz` {#fetchfromrepoorcz}
-
-This is used with repo.or.cz repositories. The arguments expected are very similar to `fetchFromGitHub` above.
-
-## `fetchFromSourcehut` {#fetchfromsourcehut}
-
-This is used with sourcehut repositories. Similar to `fetchFromGitHub` above,
-it expects `owner`, `repo`, `rev` and `hash`, but don't forget the tilde (~)
-in front of the username! Expected arguments also include `vc` ("git" (default)
-or "hg"), `domain` and `fetchSubmodules`.
-
-If `fetchSubmodules` is `true`, `fetchFromSourcehut` uses `fetchgit`
-or `fetchhg` with `fetchSubmodules` or `fetchSubrepos` set to `true`,
-respectively. Otherwise, the fetcher uses `fetchzip`.
-
-## `requireFile` {#requirefile}
-
-`requireFile` allows requesting files that cannot be fetched automatically, but whose content is known.
-This is a useful last-resort workaround for license restrictions that prohibit redistribution, or for downloads that are only accessible after authenticating interactively in a browser.
-If the requested file is present in the Nix store, the resulting derivation will not be built, because its expected output is already available.
-Otherwise, the builder will run, but fail with a message explaining to the user how to provide the file. The following code, for example:
-
-```
-requireFile {
-  name = "jdk-${version}_linux-x64_bin.tar.gz";
-  url = "https://www.oracle.com/java/technologies/javase-jdk11-downloads.html";
-  sha256 = "94bd34f85ee38d3ef59e5289ec7450b9443b924c55625661fffe66b03f2c8de2";
-}
-```
-results in this error message:
-```
-***
-Unfortunately, we cannot download file jdk-11.0.10_linux-x64_bin.tar.gz automatically.
-Please go to https://www.oracle.com/java/technologies/javase-jdk11-downloads.html to download it yourself, and add it to the Nix store
-using either
-  nix-store --add-fixed sha256 jdk-11.0.10_linux-x64_bin.tar.gz
-or
-  nix-prefetch-url --type sha256 file:///path/to/jdk-11.0.10_linux-x64_bin.tar.gz
-
-***
-```

doc/builders/images.xml

@@ -1,15 +0,0 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="chap-images">
- <title>Images</title>
- <para>
-  This chapter describes tools for creating various types of images.
- </para>
- <xi:include href="images/appimagetools.section.xml" />
- <xi:include href="images/dockertools.section.xml" />
- <xi:include href="images/ocitools.section.xml" />
- <xi:include href="images/snaptools.section.xml" />
- <xi:include href="images/portableservice.section.xml" />
- <xi:include href="images/makediskimage.section.xml" />
- <xi:include href="images/binarycache.section.xml" />
-</chapter>

doc/builders/images/appimagetools.section.md

@@ -1,48 +0,0 @@
-# pkgs.appimageTools {#sec-pkgs-appimageTools}
-
-`pkgs.appimageTools` is a set of functions for extracting and wrapping [AppImage](https://appimage.org/) files. They are meant to be used if traditional packaging from source is infeasible, or it would take too long. To quickly run an AppImage file, `pkgs.appimage-run` can be used as well.
-
-::: {.warning}
-The `appimageTools` API is unstable and may be subject to backwards-incompatible changes in the future.
-:::
-
-## AppImage formats {#ssec-pkgs-appimageTools-formats}
-
-There are different formats for AppImages, see [the specification](https://github.com/AppImage/AppImageSpec/blob/74ad9ca2f94bf864a4a0dac1f369dd4f00bd1c28/draft.md#image-format) for details.
-
-- Type 1 images are ISO 9660 files that are also ELF executables.
-- Type 2 images are ELF executables with an appended filesystem.
-
-They can be told apart with `file -k`:
-
-```ShellSession
-$ file -k type1.AppImage
-type1.AppImage: ELF 64-bit LSB executable, x86-64, version 1 (SYSV) ISO 9660 CD-ROM filesystem data 'AppImage' (Lepton 3.x), scale 0-0,
-spot sensor temperature 0.000000, unit celsius, color scheme 0, calibration: offset 0.000000, slope 0.000000, dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.18, BuildID[sha1]=d629f6099d2344ad82818172add1d38c5e11bc6d, stripped\012- data
-
-$ file -k type2.AppImage
-type2.AppImage: ELF 64-bit LSB executable, x86-64, version 1 (SYSV) (Lepton 3.x), scale 232-60668, spot sensor temperature -4.187500, color scheme 15, show scale bar, calibration: offset -0.000000, slope 0.000000 (Lepton 2.x), scale 4111-45000, spot sensor temperature 412442.250000, color scheme 3, minimum point enabled, calibration: offset -75402534979642766821519867692934234112.000000, slope 5815371847733706829839455140374904832.000000, dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.18, BuildID[sha1]=79dcc4e55a61c293c5e19edbd8d65b202842579f, stripped\012- data
-```
-
-Note how the type 1 AppImage is described as an `ISO 9660 CD-ROM filesystem`, and the type 2 AppImage is not.
-
-## Wrapping {#ssec-pkgs-appimageTools-wrapping}
-
-Depending on the type of AppImage you're wrapping, you'll have to use `wrapType1` or `wrapType2`.
-
-```nix
-appimageTools.wrapType2 { # or wrapType1
-  name = "patchwork";
-  src = fetchurl {
-    url = "https://github.com/ssbc/patchwork/releases/download/v3.11.4/Patchwork-3.11.4-linux-x86_64.AppImage";
-    hash = "sha256-OqTitCeZ6xmWbqYTXp8sDrmVgTNjPZNW0hzUPW++mq4=";
-  };
-  extraPkgs = pkgs: with pkgs; [ ];
-}
-```
-
-- `name` specifies the name of the resulting image.
-- `src` specifies the AppImage file to extract.
-- `extraPkgs` allows you to pass a function to include additional packages inside the FHS environment your AppImage is going to run in. There are a few ways to learn which dependencies an application needs:
-  - Looking through the extracted AppImage files, reading its scripts and running `patchelf` and `ldd` on its executables. This can also be done in `appimage-run`, by setting `APPIMAGE_DEBUG_EXEC=bash`.
-  - Running `strace -vfefile` on the wrapped executable, looking for libraries that can't be found.

doc/builders/images/binarycache.section.md

@@ -1,49 +0,0 @@
-# pkgs.mkBinaryCache {#sec-pkgs-binary-cache}
-
-`pkgs.mkBinaryCache` is a function for creating Nix flat-file binary caches. Such a cache exists as a directory on disk, and can be used as a Nix substituter by passing `--substituter file:///path/to/cache` to Nix commands.
-
-Nix packages are most commonly shared between machines using [HTTP, SSH, or S3](https://nixos.org/manual/nix/stable/package-management/sharing-packages.html), but a flat-file binary cache can still be useful in some situations. For example, you can copy it directly to another machine, or make it available on a network file system. It can also be a convenient way to make some Nix packages available inside a container via bind-mounting.
-
-Note that this function is meant for advanced use-cases. The more idiomatic way to work with flat-file binary caches is via the [nix-copy-closure](https://nixos.org/manual/nix/stable/command-ref/nix-copy-closure.html) command. You may also want to consider [dockerTools](#sec-pkgs-dockerTools) for your containerization needs.
-
-## Example
-
-The following derivation will construct a flat-file binary cache containing the closure of `hello`.
-
-```nix
-mkBinaryCache {
-  rootPaths = [hello];
-}
-```
-
-- `rootPaths` specifies a list of root derivations. The transitive closure of these derivations' outputs will be copied into the cache.
-
-Here's an example of building and using the cache.
-
-Build the cache on one machine, `host1`:
-
-```shellSession
-nix-build -E 'with import <nixpkgs> {}; mkBinaryCache { rootPaths = [hello]; }'
-```
-
-```shellSession
-/nix/store/cc0562q828rnjqjyfj23d5q162gb424g-binary-cache
-```
-
-Copy the resulting directory to the other machine, `host2`:
-
-```shellSession
-scp result host2:/tmp/hello-cache
-```
-
-Substitute the derivation using the flat-file binary cache on the other machine, `host2`:
-```shellSession
-nix-build -A hello '<nixpkgs>' \
-  --option require-sigs false \
-  --option trusted-substituters file:///tmp/hello-cache \
-  --option substituters file:///tmp/hello-cache
-```
-
-```shellSession
-/nix/store/gl5a41azbpsadfkfmbilh9yk40dh5dl0-hello-2.12.1
-```

doc/builders/images/dockertools.section.md

@@ -1,539 +0,0 @@
-# pkgs.dockerTools {#sec-pkgs-dockerTools}
-
-`pkgs.dockerTools` is a set of functions for creating and manipulating Docker images according to the [Docker Image Specification v1.2.0](https://github.com/moby/moby/blob/master/image/spec/v1.2.md#docker-image-specification-v120). Docker itself is not used to perform any of the operations done by these functions.
-
-## buildImage {#ssec-pkgs-dockerTools-buildImage}
-
-This function is analogous to the `docker build` command, in that it can be used to build a Docker-compatible repository tarball containing a single image with one or multiple layers. As such, the result is suitable for being loaded in Docker with `docker load`.
-
-The parameters of `buildImage` with relative example values are described below:
-
-[]{#ex-dockerTools-buildImage}
-[]{#ex-dockerTools-buildImage-runAsRoot}
-
-```nix
-buildImage {
-  name = "redis";
-  tag = "latest";
-
-  fromImage = someBaseImage;
-  fromImageName = null;
-  fromImageTag = "latest";
-
-  copyToRoot = pkgs.buildEnv {
-    name = "image-root";
-    paths = [ pkgs.redis ];
-    pathsToLink = [ "/bin" ];
-  };
-
-  runAsRoot = ''
-    #!${pkgs.runtimeShell}
-    mkdir -p /data
-  '';
-
-  config = {
-    Cmd = [ "/bin/redis-server" ];
-    WorkingDir = "/data";
-    Volumes = { "/data" = { }; };
-  };
-
-  diskSize = 1024;
-  buildVMMemorySize = 512;
-}
-```
-
-The above example will build a Docker image `redis/latest` from the given base image. Loading and running this image in Docker results in `redis-server` being started automatically.
-
-- `name` specifies the name of the resulting image. This is the only required argument for `buildImage`.
-
-- `tag` specifies the tag of the resulting image. By default it's `null`, which indicates that the nix output hash will be used as tag.
-
-- `fromImage` is the repository tarball containing the base image. It must be a valid Docker image, such as exported by `docker save`. By default it's `null`, which can be seen as equivalent to `FROM scratch` of a `Dockerfile`.
-
-- `fromImageName` can be used to further specify the base image within the repository, in case it contains multiple images. By default it's `null`, in which case `buildImage` will peek the first image available in the repository.
-
-- `fromImageTag` can be used to further specify the tag of the base image within the repository, in case an image contains multiple tags. By default it's `null`, in which case `buildImage` will peek the first tag available for the base image.
-
-- `copyToRoot` is a derivation that will be copied in the new layer of the resulting image. This can be similarly seen as `ADD contents/ /` in a `Dockerfile`. By default it's `null`.
-
-- `runAsRoot` is a bash script that will run as root in an environment that overlays the existing layers of the base image with the new resulting layer, including the previously copied `contents` derivation. This can be similarly seen as `RUN ...` in a `Dockerfile`.
-
-> **_NOTE:_** Using this parameter requires the `kvm` device to be available.
-
-- `config` is used to specify the configuration of the containers that will be started off the built image in Docker. The available options are listed in the [Docker Image Specification v1.2.0](https://github.com/moby/moby/blob/master/image/spec/v1.2.md#image-json-field-descriptions).
-
-- `architecture` is _optional_ and used to specify the image architecture, this is useful for multi-architecture builds that don't need cross compiling. If not specified it will default to `hostPlatform`.
-
-- `diskSize` is used to specify the disk size of the VM used to build the image in megabytes. By default it's 1024 MiB.
-
-- `buildVMMemorySize` is used to specify the memory size of the VM to build the image in megabytes. By default it's 512 MiB.
-
-After the new layer has been created, its closure (to which `contents`, `config` and `runAsRoot` contribute) will be copied in the layer itself. Only new dependencies that are not already in the existing layers will be copied.
-
-At the end of the process, only one new single layer will be produced and added to the resulting image.
-
-The resulting repository will only list the single image `image/tag`. In the case of [the `buildImage` example](#ex-dockerTools-buildImage), it would be `redis/latest`.
-
-It is possible to inspect the arguments with which an image was built using its `buildArgs` attribute.
-
-> **_NOTE:_** If you see errors similar to `getProtocolByName: does not exist (no such protocol name: tcp)` you may need to add `pkgs.iana-etc` to `contents`.
-
-> **_NOTE:_** If you see errors similar to `Error_Protocol ("certificate has unknown CA",True,UnknownCa)` you may need to add `pkgs.cacert` to `contents`.
-
-By default `buildImage` will use a static date of one second past the UNIX Epoch. This allows `buildImage` to produce binary reproducible images. When listing images with `docker images`, the newly created images will be listed like this:
-
-```ShellSession
-$ docker images
-REPOSITORY   TAG      IMAGE ID       CREATED        SIZE
-hello        latest   08c791c7846e   48 years ago   25.2MB
-```
-
-You can break binary reproducibility but have a sorted, meaningful `CREATED` column by setting `created` to `now`.
-
-```nix
-pkgs.dockerTools.buildImage {
-  name = "hello";
-  tag = "latest";
-  created = "now";
-  copyToRoot = pkgs.buildEnv {
-    name = "image-root";
-    paths = [ pkgs.hello ];
-    pathsToLink = [ "/bin" ];
-  };
-
-  config.Cmd = [ "/bin/hello" ];
-}
-```
-
-Now the Docker CLI will display a reasonable date and sort the images as expected:
-
-```ShellSession
-$ docker images
-REPOSITORY   TAG      IMAGE ID       CREATED              SIZE
-hello        latest   de2bf4786de6   About a minute ago   25.2MB
-```
-
-However, the produced images will not be binary reproducible.
-
-## buildLayeredImage {#ssec-pkgs-dockerTools-buildLayeredImage}
-
-Create a Docker image with many of the store paths being on their own layer to improve sharing between images. The image is realized into the Nix store as a gzipped tarball. Depending on the intended usage, many users might prefer to use `streamLayeredImage` instead, which this function uses internally.
-
-`name`
-
-: The name of the resulting image.
-
-`tag` _optional_
-
-: Tag of the generated image.
-
-    *Default:* the output path's hash
-
-`fromImage` _optional_
-
-: The repository tarball containing the base image. It must be a valid Docker image, such as one exported by `docker save`.
-
-    *Default:* `null`, which can be seen as equivalent to `FROM scratch` of a `Dockerfile`.
-
-`contents` _optional_
-
-: Top-level paths in the container. Either a single derivation, or a list of derivations.
-
-    *Default:* `[]`
-
-`config` _optional_
-
-`architecture` is _optional_ and used to specify the image architecture, this is useful for multi-architecture builds that don't need cross compiling. If not specified it will default to `hostPlatform`.
-
-: Run-time configuration of the container. A full list of the options available is in the [Docker Image Specification v1.2.0](https://github.com/moby/moby/blob/master/image/spec/v1.2.md#image-json-field-descriptions).
-
-    *Default:* `{}`
-
-`created` _optional_
-
-: Date and time the layers were created. Follows the same `now` exception supported by `buildImage`.
-
-    *Default:* `1970-01-01T00:00:01Z`
-
-`maxLayers` _optional_
-
-: Maximum number of layers to create.
-
-    *Default:* `100`
-
-    *Maximum:* `125`
-
-`extraCommands` _optional_
-
-: Shell commands to run while building the final layer, without access to most of the layer contents. Changes to this layer are "on top" of all the other layers, so can create additional directories and files.
-
-`fakeRootCommands` _optional_
-
-: Shell commands to run while creating the archive for the final layer in a fakeroot environment. Unlike `extraCommands`, you can run `chown` to change the owners of the files in the archive, changing fakeroot's state instead of the real filesystem. The latter would require privileges that the build user does not have. Static binaries do not interact with the fakeroot environment. By default all files in the archive will be owned by root.
-
-`enableFakechroot` _optional_
-
-: Whether to run in `fakeRootCommands` in `fakechroot`, making programs behave as though `/` is the root of the image being created, while files in the Nix store are available as usual. This allows scripts that perform installation in `/` to work as expected. Considering that `fakechroot` is implemented via the same mechanism as `fakeroot`, the same caveats apply.
-
-    *Default:* `false`
-
-### Behavior of `contents` in the final image {#dockerTools-buildLayeredImage-arg-contents}
-
-Each path directly listed in `contents` will have a symlink in the root of the image.
-
-For example:
-
-```nix
-pkgs.dockerTools.buildLayeredImage {
-  name = "hello";
-  contents = [ pkgs.hello ];
-}
-```
-
-will create symlinks for all the paths in the `hello` package:
-
-```ShellSession
-/bin/hello -> /nix/store/h1zb1padqbbb7jicsvkmrym3r6snphxg-hello-2.10/bin/hello
-/share/info/hello.info -> /nix/store/h1zb1padqbbb7jicsvkmrym3r6snphxg-hello-2.10/share/info/hello.info
-/share/locale/bg/LC_MESSAGES/hello.mo -> /nix/store/h1zb1padqbbb7jicsvkmrym3r6snphxg-hello-2.10/share/locale/bg/LC_MESSAGES/hello.mo
-```
-
-### Automatic inclusion of `config` references {#dockerTools-buildLayeredImage-arg-config}
-
-The closure of `config` is automatically included in the closure of the final image.
-
-This allows you to make very simple Docker images with very little code. This container will start up and run `hello`:
-
-```nix
-pkgs.dockerTools.buildLayeredImage {
-  name = "hello";
-  config.Cmd = [ "${pkgs.hello}/bin/hello" ];
-}
-```
-
-### Adjusting `maxLayers` {#dockerTools-buildLayeredImage-arg-maxLayers}
-
-Increasing the `maxLayers` increases the number of layers which have a chance to be shared between different images.
-
-Modern Docker installations support up to 128 layers, but older versions support as few as 42.
-
-If the produced image will not be extended by other Docker builds, it is safe to set `maxLayers` to `128`. However, it will be impossible to extend the image further.
-
-The first (`maxLayers-2`) most "popular" paths will have their own individual layers, then layer \#`maxLayers-1` will contain all the remaining "unpopular" paths, and finally layer \#`maxLayers` will contain the Image configuration.
-
-Docker's Layers are not inherently ordered, they are content-addressable and are not explicitly layered until they are composed in to an Image.
-
-## streamLayeredImage {#ssec-pkgs-dockerTools-streamLayeredImage}
-
-Builds a script which, when run, will stream an uncompressed tarball of a Docker image to stdout. The arguments to this function are as for `buildLayeredImage`. This method of constructing an image does not realize the image into the Nix store, so it saves on IO and disk/cache space, particularly with large images.
-
-The image produced by running the output script can be piped directly into `docker load`, to load it into the local docker daemon:
-
-```ShellSession
-$(nix-build) | docker load
-```
-
-Alternatively, the image be piped via `gzip` into `skopeo`, e.g., to copy it into a registry:
-
-```ShellSession
-$(nix-build) | gzip --fast | skopeo copy docker-archive:/dev/stdin docker://some_docker_registry/myimage:tag
-```
-
-## pullImage {#ssec-pkgs-dockerTools-fetchFromRegistry}
-
-This function is analogous to the `docker pull` command, in that it can be used to pull a Docker image from a Docker registry. By default [Docker Hub](https://hub.docker.com/) is used to pull images.
-
-Its parameters are described in the example below:
-
-```nix
-pullImage {
-  imageName = "nixos/nix";
-  imageDigest =
-    "sha256:473a2b527958665554806aea24d0131bacec46d23af09fef4598eeab331850fa";
-  finalImageName = "nix";
-  finalImageTag = "2.11.1";
-  sha256 = "sha256-qvhj+Hlmviz+KEBVmsyPIzTB3QlVAFzwAY1zDPIBGxc=";
-  os = "linux";
-  arch = "x86_64";
-}
-```
-
-- `imageName` specifies the name of the image to be downloaded, which can also include the registry namespace (e.g. `nixos`). This argument is required.
-
-- `imageDigest` specifies the digest of the image to be downloaded. This argument is required.
-
-- `finalImageName`, if specified, this is the name of the image to be created. Note it is never used to fetch the image since we prefer to rely on the immutable digest ID. By default it's equal to `imageName`.
-
-- `finalImageTag`, if specified, this is the tag of the image to be created. Note it is never used to fetch the image since we prefer to rely on the immutable digest ID. By default it's `latest`.
-
-- `sha256` is the checksum of the whole fetched image. This argument is required.
-
-- `os`, if specified, is the operating system of the fetched image. By default it's `linux`.
-
-- `arch`, if specified, is the cpu architecture of the fetched image. By default it's `x86_64`.
-
-`nix-prefetch-docker` command can be used to get required image parameters:
-
-```ShellSession
-$ nix run nixpkgs.nix-prefetch-docker -c nix-prefetch-docker --image-name mysql --image-tag 5
-```
-
-Since a given `imageName` may transparently refer to a manifest list of images which support multiple architectures and/or operating systems, you can supply the `--os` and `--arch` arguments to specify exactly which image you want. By default it will match the OS and architecture of the host the command is run on.
-
-```ShellSession
-$ nix-prefetch-docker --image-name mysql --image-tag 5 --arch x86_64 --os linux
-```
-
-Desired image name and tag can be set using `--final-image-name` and `--final-image-tag` arguments:
-
-```ShellSession
-$ nix-prefetch-docker --image-name mysql --image-tag 5 --final-image-name eu.gcr.io/my-project/mysql --final-image-tag prod
-```
-
-## exportImage {#ssec-pkgs-dockerTools-exportImage}
-
-This function is analogous to the `docker export` command, in that it can be used to flatten a Docker image that contains multiple layers. It is in fact the result of the merge of all the layers of the image. As such, the result is suitable for being imported in Docker with `docker import`.
-
-> **_NOTE:_** Using this function requires the `kvm` device to be available.
-
-The parameters of `exportImage` are the following:
-
-```nix
-exportImage {
-  fromImage = someLayeredImage;
-  fromImageName = null;
-  fromImageTag = null;
-
-  name = someLayeredImage.name;
-}
-```
-
-The parameters relative to the base image have the same synopsis as described in [buildImage](#ssec-pkgs-dockerTools-buildImage), except that `fromImage` is the only required argument in this case.
-
-The `name` argument is the name of the derivation output, which defaults to `fromImage.name`.
-
-## Environment Helpers {#ssec-pkgs-dockerTools-helpers}
-
-Some packages expect certain files to be available globally.
-When building an image from scratch (i.e. without `fromImage`), these files are missing.
-`pkgs.dockerTools` provides some helpers to set up an environment with the necessary files.
-You can include them in `copyToRoot` like this:
-
-```nix
-buildImage {
-  name = "environment-example";
-  copyToRoot = with pkgs.dockerTools; [
-    usrBinEnv
-    binSh
-    caCertificates
-    fakeNss
-  ];
-}
-```
-
-### usrBinEnv {#sssec-pkgs-dockerTools-helpers-usrBinEnv}
-
-This provides the `env` utility at `/usr/bin/env`.
-
-### binSh {#sssec-pkgs-dockerTools-helpers-binSh}
-
-This provides `bashInteractive` at `/bin/sh`.
-
-### caCertificates {#sssec-pkgs-dockerTools-helpers-caCertificates}
-
-This sets up `/etc/ssl/certs/ca-certificates.crt`.
-
-### fakeNss {#sssec-pkgs-dockerTools-helpers-fakeNss}
-
-Provides `/etc/passwd` and `/etc/group` that contain root and nobody.
-Useful when packaging binaries that insist on using nss to look up
-username/groups (like nginx).
-
-### shadowSetup {#ssec-pkgs-dockerTools-shadowSetup}
-
-This constant string is a helper for setting up the base files for managing users and groups, only if such files don't exist already. It is suitable for being used in a [`buildImage` `runAsRoot`](#ex-dockerTools-buildImage-runAsRoot) script for cases like in the example below:
-
-```nix
-buildImage {
-  name = "shadow-basic";
-
-  runAsRoot = ''
-    #!${pkgs.runtimeShell}
-    ${pkgs.dockerTools.shadowSetup}
-    groupadd -r redis
-    useradd -r -g redis redis
-    mkdir /data
-    chown redis:redis /data
-  '';
-}
-```
-
-Creating base files like `/etc/passwd` or `/etc/login.defs` is necessary for shadow-utils to manipulate users and groups.
-
-## fakeNss {#ssec-pkgs-dockerTools-fakeNss}
-
-If your primary goal is providing a basic skeleton for user lookups to work,
-and/or a lesser privileged user, adding `pkgs.fakeNss` to
-the container image root might be the better choice than a custom script
-running `useradd` and friends.
-
-It provides a `/etc/passwd` and `/etc/group`, containing `root` and `nobody`
-users and groups.
-
-It also provides a `/etc/nsswitch.conf`, configuring NSS host resolution to
-first check `/etc/hosts`, before checking DNS, as the default in the absence of
-a config file (`dns [!UNAVAIL=return] files`) is quite unexpected.
-
-You can pair it with `binSh`, which provides `bin/sh` as a symlink
-to `bashInteractive` (as `/bin/sh` is configured as a shell).
-
-```nix
-buildImage {
-  name = "shadow-basic";
-
-  copyToRoot = pkgs.buildEnv {
-    name = "image-root";
-    paths = [ binSh pkgs.fakeNss ];
-    pathsToLink = [ "/bin" "/etc" "/var" ];
-  };
-}
-```
-
-## buildNixShellImage {#ssec-pkgs-dockerTools-buildNixShellImage}
-
-Create a Docker image that sets up an environment similar to that of running `nix-shell` on a derivation.
-When run in Docker, this environment somewhat resembles the Nix sandbox typically used by `nix-build`, with a major difference being that access to the internet is allowed.
-It additionally also behaves like an interactive `nix-shell`, running things like `shellHook` and setting an interactive prompt.
-If the derivation is fully buildable (i.e. `nix-build` can be used on it), running `buildDerivation` inside such a Docker image will build the derivation, with all its outputs being available in the correct `/nix/store` paths, pointed to by the respective environment variables like `$out`, etc.
-
-::: {.warning}
-The behavior doesn't match `nix-shell` or `nix-build` exactly and this function is known not to work correctly for e.g. fixed-output derivations, content-addressed derivations, impure derivations and other special types of derivations.
-:::
-
-### Arguments
-
-`drv`
-
-: The derivation on which to base the Docker image.
-
-    Adding packages to the Docker image is possible by e.g. extending the list of `nativeBuildInputs` of this derivation like
-
-    ```nix
-    buildNixShellImage {
-      drv = someDrv.overrideAttrs (old: {
-        nativeBuildInputs = old.nativeBuildInputs or [] ++ [
-          somethingExtra
-        ];
-      });
-      # ...
-    }
-    ```
-
-    Similarly, you can extend the image initialization script by extending `shellHook`
-
-`name` _optional_
-
-: The name of the resulting image.
-
-    *Default:* `drv.name + "-env"`
-
-`tag` _optional_
-
-: Tag of the generated image.
-
-    *Default:* the resulting image derivation output path's hash
-
-`uid`/`gid` _optional_
-
-: The user/group ID to run the container as. This is like a `nixbld` build user.
-
-    *Default:* 1000/1000
-
-`homeDirectory` _optional_
-
-: The home directory of the user the container is running as
-
-    *Default:* `/build`
-
-`shell` _optional_
-
-: The path to the `bash` binary to use as the shell. This shell is started when running the image.
-
-    *Default:* `pkgs.bashInteractive + "/bin/bash"`
-
-`command` _optional_
-
-: Run this command in the environment of the derivation, in an interactive shell. See the `--command` option in the [`nix-shell` documentation](https://nixos.org/manual/nix/stable/command-ref/nix-shell.html?highlight=nix-shell#options).
-
-    *Default:* (none)
-
-`run` _optional_
-
-: Same as `command`, but runs the command in a non-interactive shell instead. See the `--run` option in the [`nix-shell` documentation](https://nixos.org/manual/nix/stable/command-ref/nix-shell.html?highlight=nix-shell#options).
-
-    *Default:* (none)
-
-### Example
-
-The following shows how to build the `pkgs.hello` package inside a Docker container built with `buildNixShellImage`.
-
-```nix
-with import <nixpkgs> {};
-dockerTools.buildNixShellImage {
-  drv = hello;
-}
-```
-
-Build the derivation:
-
-```console
-nix-build hello.nix
-```
-
-    these 8 derivations will be built:
-      /nix/store/xmw3a5ln29rdalavcxk1w3m4zb2n7kk6-nix-shell-rc.drv
-    ...
-    Creating layer 56 from paths: ['/nix/store/crpnj8ssz0va2q0p5ibv9i6k6n52gcya-stdenv-linux']
-    Creating layer 57 with customisation...
-    Adding manifests...
-    Done.
-    /nix/store/cpyn1lc897ghx0rhr2xy49jvyn52bazv-hello-2.12-env.tar.gz
-
-Load the image:
-
-```console
-docker load -i result
-```
-
-    0d9f4c4cd109: Loading layer [==================================================>]   2.56MB/2.56MB
-    ...
-    ab1d897c0697: Loading layer [==================================================>]  10.24kB/10.24kB
-    Loaded image: hello-2.12-env:pgj9h98nal555415faa43vsydg161bdz
-
-Run the container:
-
-```console
-docker run -it hello-2.12-env:pgj9h98nal555415faa43vsydg161bdz
-```
-
-    [nix-shell:/build]$
-
-In the running container, run the build:
-
-```console
-buildDerivation
-```
-
-    unpacking sources
-    unpacking source archive /nix/store/8nqv6kshb3vs5q5bs2k600xpj5bkavkc-hello-2.12.tar.gz
-    ...
-    patching script interpreter paths in /nix/store/z5wwy5nagzy15gag42vv61c2agdpz2f2-hello-2.12
-    checking for references to /build/ in /nix/store/z5wwy5nagzy15gag42vv61c2agdpz2f2-hello-2.12...
-
-Check the build result:
-
-```console
-$out/bin/hello
-```
-
-    Hello, world!

doc/builders/images/makediskimage.section.md

@@ -1,107 +0,0 @@
-# `<nixpkgs/nixos/lib/make-disk-image.nix>` {#sec-make-disk-image}
-
-`<nixpkgs/nixos/lib/make-disk-image.nix>` is a function to create _disk images_ in multiple formats: raw, QCOW2 (QEMU), QCOW2-Compressed (compressed version), VDI (VirtualBox), VPC (VirtualPC).
-
-This function can create images in two ways:
-
-- using `cptofs` without any virtual machine to create a Nix store disk image,
-- using a virtual machine to create a full NixOS installation.
-
-When testing early-boot or lifecycle parts of NixOS such as a bootloader or multiple generations, it is necessary to opt for a full NixOS system installation.
-Whereas for many web servers, applications, it is possible to work with a Nix store only disk image and is faster to build.
-
-NixOS tests also use this function when preparing the VM. The `cptofs` method is used when `virtualisation.useBootLoader` is false (the default). Otherwise the second method is used.
-
-## Features
-
-For reference, read the function signature source code for documentation on arguments: <https://github.com/NixOS/nixpkgs/blob/master/nixos/lib/make-disk-image.nix>.
-Features are separated in various sections depending on if you opt for a Nix-store only image or a full NixOS image.
-
-### Common
-
-- arbitrary NixOS configuration
-- automatic or bound disk size: `diskSize` parameter, `additionalSpace` can be set when `diskSize` is `auto` to add a constant of disk space
-- multiple partition table layouts: EFI, legacy, legacy + GPT, hybrid, none through `partitionTableType` parameter
-- OVMF or EFI firmwares and variables templates can be customized
-- root filesystem `fsType` can be customized to whatever `mkfs.${fsType}` exist during operations
-- root filesystem label can be customized, defaults to `nix-store` if it's a Nix store image, otherwise `nixpkgs/nixos`
-- arbitrary code can be executed after disk image was produced with `postVM`
-- the current nixpkgs can be realized as a channel in the disk image, which will change the hash of the image when the sources are updated
-- additional store paths can be provided through `additionalPaths`
-
-### Full NixOS image
-
-- arbitrary contents with permissions can be placed in the target filesystem using `contents`
-- a `/etc/nixpkgs/nixos/configuration.nix` can be provided through `configFile`
-- bootloaders are supported
-- EFI variables can be mutated during image production and the result is exposed in `$out`
-- boot partition size when partition table is `efi` or `hybrid`
-
-### On bit-to-bit reproducibility
-
-Images are **NOT** deterministic, please do not hesitate to try to fix this, source of determinisms are (not exhaustive) :
-
-- bootloader installation have timestamps
-- SQLite Nix store database contain registration times
-- `/etc/shadow` is in a non-deterministic order
-
-A `deterministic` flag is available for best efforts determinism.
-
-## Usage
-
-To produce a Nix-store only image:
-```nix
-let
-  pkgs = import <nixpkgs> {};
-  lib = pkgs.lib;
-  make-disk-image = import <nixpkgs/nixos/lib/make-disk-image.nix>;
-in
-  make-disk-image {
-    inherit pkgs lib;
-    config = {};
-    additionalPaths = [ ];
-    format = "qcow2";
-    onlyNixStore = true;
-    partitionTableType = "none";
-    installBootLoader = false;
-    touchEFIVars = false;
-    diskSize = "auto";
-    additionalSpace = "0M"; # Defaults to 512M.
-    copyChannel = false;
-  }
-```
-
-Some arguments can be left out, they are shown explicitly for the sake of the example.
-
-Building this derivation will provide a QCOW2 disk image containing only the Nix store and its registration information.
-
-To produce a NixOS installation image disk with UEFI and bootloader installed:
-```nix
-let
-  pkgs = import <nixpkgs> {};
-  lib = pkgs.lib;
-  make-disk-image = import <nixpkgs/nixos/lib/make-disk-image.nix>;
-  evalConfig = import <nixpkgs/nixos/lib/eval-config.nix>;
-in
-  make-disk-image {
-    inherit pkgs lib;
-    config = evalConfig {
-      modules = [
-        {
-          fileSystems."/" = { device = "/dev/vda"; fsType = "ext4"; autoFormat = true; };
-          boot.grub.device = "/dev/vda";
-        }
-      ];
-    };
-    format = "qcow2";
-    onlyNixStore = false;
-    partitionTableType = "legacy+gpt";
-    installBootLoader = true;
-    touchEFIVars = true;
-    diskSize = "auto";
-    additionalSpace = "0M"; # Defaults to 512M.
-    copyChannel = false;
-  }
-```
-
-

doc/builders/images/ocitools.section.md

@@ -1,37 +0,0 @@
-# pkgs.ociTools {#sec-pkgs-ociTools}
-
-`pkgs.ociTools` is a set of functions for creating containers according to the [OCI container specification v1.0.0](https://github.com/opencontainers/runtime-spec). Beyond that, it makes no assumptions about the container runner you choose to use to run the created container.
-
-## buildContainer {#ssec-pkgs-ociTools-buildContainer}
-
-This function creates a simple OCI container that runs a single command inside of it. An OCI container consists of a `config.json` and a rootfs directory. The nix store of the container will contain all referenced dependencies of the given command.
-
-The parameters of `buildContainer` with an example value are described below:
-
-```nix
-buildContainer {
-  args = [
-    (with pkgs;
-      writeScript "run.sh" ''
-        #!${bash}/bin/bash
-        exec ${bash}/bin/bash
-      '').outPath
-  ];
-
-  mounts = {
-    "/data" = {
-      type = "none";
-      source = "/var/lib/mydata";
-      options = [ "bind" ];
-    };
-  };
-
-  readonly = false;
-}
-```
-
-- `args` specifies a set of arguments to run inside the container. This is the only required argument for `buildContainer`. All referenced packages inside the derivation will be made available inside the container.
-
-- `mounts` specifies additional mount points chosen by the user. By default only a minimal set of necessary filesystems are mounted into the container (e.g procfs, cgroupfs)
-
-- `readonly` makes the container's rootfs read-only if it is set to true. The default value is false `false`.

doc/builders/images/portableservice.section.md

@@ -1,81 +0,0 @@
-# pkgs.portableService {#sec-pkgs-portableService}
-
-`pkgs.portableService` is a function to create _portable service images_,
-as read-only, immutable, `squashfs` archives.
-
-systemd supports a concept of [Portable Services](https://systemd.io/PORTABLE_SERVICES/).
-Portable Services are a delivery method for system services that uses two specific features of container management:
-
-* Applications are bundled. I.e. multiple services, their binaries and
-  all their dependencies are packaged in an image, and are run directly from it.
-* Stricter default security policies, i.e. sandboxing of applications.
-
-This allows using Nix to build images which can be run on many recent Linux distributions.
-
-The primary tool for interacting with Portable Services is `portablectl`,
-and they are managed by the `systemd-portabled` system service.
-
-::: {.note}
-Portable services are supported starting with systemd 239 (released on 2018-06-22).
-:::
-
-A very simple example of using `portableService` is described below:
-
-[]{#ex-pkgs-portableService}
-
-```nix
-pkgs.portableService {
-  pname = "demo";
-  version = "1.0";
-  units = [ demo-service demo-socket ];
-}
-```
-
-The above example will build an squashfs archive image in `result/$pname_$version.raw`. The image will contain the
-file system structure as required by the portable service specification, and a subset of the Nix store with all the
-dependencies of the two derivations in the `units` list.
-`units` must be a list of derivations, and their names must be prefixed with the service name (`"demo"` in this case).
-Otherwise `systemd-portabled` will ignore them.
-
-::: {.note}
-The `.raw` file extension of the image is required by the portable services specification.
-:::
-
-Some other options available are:
-- `description`, `homepage`
-
-  Are added to the `/etc/os-release` in the image and are shown by the portable services tooling.
-  Default to empty values, not added to os-release.
-- `symlinks`
-
-  A list of attribute sets {object, symlink}. Symlinks will be created  in the root filesystem of the image to
-  objects in the Nix store. Defaults to an empty list.
-- `contents`
-
-  A list of additional derivations to be included in the image Nix store, as-is. Defaults to an empty list.
-- `squashfsTools`
-
-  Defaults to `pkgs.squashfsTools`, allows you to override the package that provides `mksquashfs`.
-- `squash-compression`, `squash-block-size`
-
-  Options to `mksquashfs`. Default to `"xz -Xdict-size 100%"` and `"1M"` respectively.
-
-A typical usage of `symlinks` would be:
-```nix
-  symlinks = [
-    { object = "${pkgs.cacert}/etc/ssl"; symlink = "/etc/ssl"; }
-    { object = "${pkgs.bash}/bin/bash"; symlink = "/bin/sh"; }
-    { object = "${pkgs.php}/bin/php"; symlink = "/usr/bin/php"; }
-  ];
-```
-to create these symlinks for legacy applications that assume them existing globally.
-
-Once the image is created, and deployed on a host in `/var/lib/portables/`, you can attach the image and run the service. As root run:
-```console
-portablectl attach demo_1.0.raw
-systemctl enable --now demo.socket
-systemctl enable --now demo.service
-```
-::: {.note}
-See the [man page](https://www.freedesktop.org/software/systemd/man/portablectl.html) of `portablectl` for more info on its usage.
-:::

doc/builders/images/snaptools.section.md

@@ -1,71 +0,0 @@
-# pkgs.snapTools {#sec-pkgs-snapTools}
-
-`pkgs.snapTools` is a set of functions for creating Snapcraft images. Snap and Snapcraft is not used to perform these operations.
-
-## The makeSnap Function {#ssec-pkgs-snapTools-makeSnap-signature}
-
-`makeSnap` takes a single named argument, `meta`. This argument mirrors [the upstream `snap.yaml` format](https://docs.snapcraft.io/snap-format) exactly.
-
-The `base` should not be specified, as `makeSnap` will force set it.
-
-Currently, `makeSnap` does not support creating GUI stubs.
-
-## Build a Hello World Snap {#ssec-pkgs-snapTools-build-a-snap-hello}
-
-The following expression packages GNU Hello as a Snapcraft snap.
-
-``` {#ex-snapTools-buildSnap-hello .nix}
-let
-  inherit (import <nixpkgs> { }) snapTools hello;
-in snapTools.makeSnap {
-  meta = {
-    name = "hello";
-    summary = hello.meta.description;
-    description = hello.meta.longDescription;
-    architectures = [ "amd64" ];
-    confinement = "strict";
-    apps.hello.command = "${hello}/bin/hello";
-  };
-}
-```
-
-`nix-build` this expression and install it with `snap install ./result --dangerous`. `hello` will now be the Snapcraft version of the package.
-
-## Build a Graphical Snap {#ssec-pkgs-snapTools-build-a-snap-firefox}
-
-Graphical programs require many more integrations with the host. This example uses Firefox as an example because it is one of the most complicated programs we could package.
-
-``` {#ex-snapTools-buildSnap-firefox .nix}
-let
-  inherit (import <nixpkgs> { }) snapTools firefox;
-in snapTools.makeSnap {
-  meta = {
-    name = "nix-example-firefox";
-    summary = firefox.meta.description;
-    architectures = [ "amd64" ];
-    apps.nix-example-firefox = {
-      command = "${firefox}/bin/firefox";
-      plugs = [
-        "pulseaudio"
-        "camera"
-        "browser-support"
-        "avahi-observe"
-        "cups-control"
-        "desktop"
-        "desktop-legacy"
-        "gsettings"
-        "home"
-        "network"
-        "mount-observe"
-        "removable-media"
-        "x11"
-      ];
-    };
-    confinement = "strict";
-  };
-}
-```
-
-`nix-build` this expression and install it with `snap install ./result --dangerous`. `nix-example-firefox` will now be the Snapcraft version of the Firefox package.
-
-The specific meaning behind plugs can be looked up in the [Snapcraft interface documentation](https://docs.snapcraft.io/supported-interfaces).

doc/builders/packages/cataclysm-dda.section.md

@@ -1,129 +0,0 @@
-# Cataclysm: Dark Days Ahead {#cataclysm-dark-days-ahead}
-
-## How to install Cataclysm DDA {#how-to-install-cataclysm-dda}
-
-To install the latest stable release of Cataclysm DDA to your profile, execute
-`nix-env -f "<nixpkgs>" -iA cataclysm-dda`. For the curses build (build
-without tiles), install `cataclysmDDA.stable.curses`. Note: `cataclysm-dda` is
-an alias to `cataclysmDDA.stable.tiles`.
-
-If you like access to a development build of your favorite git revision,
-override `cataclysm-dda-git` (or `cataclysmDDA.git.curses` if you like curses
-build):
-
-```nix
-cataclysm-dda-git.override {
-  version = "YYYY-MM-DD";
-  rev = "YOUR_FAVORITE_REVISION";
-  sha256 = "CHECKSUM_OF_THE_REVISION";
-}
-```
-
-The sha256 checksum can be obtained by
-
-```sh
-nix-prefetch-url --unpack "https://github.com/CleverRaven/Cataclysm-DDA/archive/${YOUR_FAVORITE_REVISION}.tar.gz"
-```
-
-The default configuration directory is `~/.cataclysm-dda`. If you prefer
-`$XDG_CONFIG_HOME/cataclysm-dda`, override the derivation:
-
-```nix
-cataclysm-dda.override {
-  useXdgDir = true;
-}
-```
-
-## Important note for overriding packages {#important-note-for-overriding-packages}
-
-After applying `overrideAttrs`, you need to fix `passthru.pkgs` and
-`passthru.withMods` attributes either manually or by using `attachPkgs`:
-
-```nix
-let
-  # You enabled parallel building.
-  myCDDA = cataclysm-dda-git.overrideAttrs (_: {
-    enableParallelBuilding = true;
-  });
-
-  # Unfortunately, this refers to the package before overriding and
-  # parallel building is still disabled.
-  badExample = myCDDA.withMods (_: []);
-
-  inherit (cataclysmDDA) attachPkgs pkgs wrapCDDA;
-
-  # You can fix it by hand
-  goodExample1 = myCDDA.overrideAttrs (old: {
-    passthru = old.passthru // {
-      pkgs = pkgs.override { build = goodExample1; };
-      withMods = wrapCDDA goodExample1;
-    };
-  });
-
-  # or by using a helper function `attachPkgs`.
-  goodExample2 = attachPkgs pkgs myCDDA;
-in
-
-# badExample                     # parallel building disabled
-# goodExample1.withMods (_: [])  # parallel building enabled
-goodExample2.withMods (_: [])    # parallel building enabled
-```
-
-## Customizing with mods {#customizing-with-mods}
-
-To install Cataclysm DDA with mods of your choice, you can use `withMods`
-attribute:
-
-```nix
-cataclysm-dda.withMods (mods: with mods; [
-  tileset.UndeadPeople
-])
-```
-
-All mods, soundpacks, and tilesets available in nixpkgs are found in
-`cataclysmDDA.pkgs`.
-
-Here is an example to modify existing mods and/or add more mods not available
-in nixpkgs:
-
-```nix
-let
-  customMods = self: super: lib.recursiveUpdate super {
-    # Modify existing mod
-    tileset.UndeadPeople = super.tileset.UndeadPeople.overrideAttrs (old: {
-      # If you like to apply a patch to the tileset for example
-      patches = [ ./path/to/your.patch ];
-    });
-
-    # Add another mod
-    mod.Awesome = cataclysmDDA.buildMod {
-      modName = "Awesome";
-      version = "0.x";
-      src = fetchFromGitHub {
-        owner = "Someone";
-        repo = "AwesomeMod";
-        rev = "...";
-        hash = "...";
-      };
-      # Path to be installed in the unpacked source (default: ".")
-      modRoot = "contents/under/this/path/will/be/installed";
-    };
-
-    # Add another soundpack
-    soundpack.Fantastic = cataclysmDDA.buildSoundPack {
-      # ditto
-    };
-
-    # Add another tileset
-    tileset.SuperDuper = cataclysmDDA.buildTileSet {
-      # ditto
-    };
-  };
-in
-cataclysm-dda.withMods (mods: with mods.extend customMods; [
-  tileset.UndeadPeople
-  mod.Awesome
-  soundpack.Fantastic
-  tileset.SuperDuper
-])
-```

doc/builders/packages/citrix.section.md

@@ -1,32 +0,0 @@
-# Citrix Workspace {#sec-citrix}
-
-The [Citrix Workspace App](https://www.citrix.com/products/workspace-app/) is a remote desktop viewer which provides access to [XenDesktop](https://www.citrix.com/products/xenapp-xendesktop/) installations.
-
-## Basic usage {#sec-citrix-base}
-
-The tarball archive needs to be downloaded manually, as the license agreements of the vendor for [Citrix Workspace](https://www.citrix.com/downloads/workspace-app/linux/workspace-app-for-linux-latest.html) needs to be accepted first. Then run `nix-prefetch-url file://$PWD/linuxx64-$version.tar.gz`. With the archive available in the store, the package can be built and installed with Nix.
-
-## Citrix Self-service {#sec-citrix-selfservice}
-
-The [self-service](https://support.citrix.com/article/CTX200337) is an application managing Citrix desktops and applications. Please note that this feature only works with at least citrix_workspace_20_06_0 and later versions.
-
-In order to set this up, you first have to [download the `.cr` file from the Netscaler Gateway](https://its.uiowa.edu/support/article/102186). After that, you can configure the `selfservice` like this:
-
-```ShellSession
-$ storebrowse -C ~/Downloads/receiverconfig.cr
-$ selfservice
-```
-
-## Custom certificates {#sec-citrix-custom-certs}
-
-The `Citrix Workspace App` in `nixpkgs` trusts several certificates [from the Mozilla database](https://curl.haxx.se/docs/caextract.html) by default. However, several companies using Citrix might require their own corporate certificate. On distros with imperative packaging, these certs can be stored easily in [`$ICAROOT`](https://citrix.github.io/receiver-for-linux-command-reference/), however this directory is a store path in `nixpkgs`. In order to work around this issue, the package provides a simple mechanism to add custom certificates without rebuilding the entire package using `symlinkJoin`:
-
-```nix
-with import <nixpkgs> { config.allowUnfree = true; };
-let
-  extraCerts = [
-    ./custom-cert-1.pem
-    ./custom-cert-2.pem # ...
-  ];
-in citrix_workspace.override { inherit extraCerts; }
-```

doc/builders/packages/dlib.section.md

@@ -1,13 +0,0 @@
-# DLib {#dlib}
-
-[DLib](http://dlib.net/) is a modern, C++-based toolkit which provides several machine learning algorithms.
-
-## Compiling without AVX support {#compiling-without-avx-support}
-
-Especially older CPUs don't support [AVX](https://en.wikipedia.org/wiki/Advanced_Vector_Extensions) (Advanced Vector Extensions) instructions that are used by DLib to optimize their algorithms.
-
-On the affected hardware errors like `Illegal instruction` will occur. In those cases AVX support needs to be disabled:
-
-```nix
-self: super: { dlib = super.dlib.override { avxSupport = false; }; }
-```

doc/builders/packages/eclipse.section.md

@@ -1,64 +0,0 @@
-# Eclipse {#sec-eclipse}
-
-The Nix expressions related to the Eclipse platform and IDE are in [`pkgs/applications/editors/eclipse`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/editors/eclipse).
-
-Nixpkgs provides a number of packages that will install Eclipse in its various forms. These range from the bare-bones Eclipse Platform to the more fully featured Eclipse SDK or Scala-IDE packages and multiple version are often available. It is possible to list available Eclipse packages by issuing the command:
-
-```ShellSession
-$ nix-env -f '<nixpkgs>' -qaP -A eclipses --description
-```
-
-Once an Eclipse variant is installed, it can be run using the `eclipse` command, as expected. From within Eclipse, it is then possible to install plugins in the usual manner by either manually specifying an Eclipse update site or by installing the Marketplace Client plugin and using it to discover and install other plugins. This installation method provides an Eclipse installation that closely resemble a manually installed Eclipse.
-
-If you prefer to install plugins in a more declarative manner, then Nixpkgs also offer a number of Eclipse plugins that can be installed in an _Eclipse environment_. This type of environment is created using the function `eclipseWithPlugins` found inside the `nixpkgs.eclipses` attribute set. This function takes as argument `{ eclipse, plugins ? [], jvmArgs ? [] }` where `eclipse` is a one of the Eclipse packages described above, `plugins` is a list of plugin derivations, and `jvmArgs` is a list of arguments given to the JVM running the Eclipse. For example, say you wish to install the latest Eclipse Platform with the popular Eclipse Color Theme plugin and also allow Eclipse to use more RAM. You could then add:
-
-```nix
-packageOverrides = pkgs: {
-  myEclipse = with pkgs.eclipses; eclipseWithPlugins {
-    eclipse = eclipse-platform;
-    jvmArgs = [ "-Xmx2048m" ];
-    plugins = [ plugins.color-theme ];
-  };
-}
-```
-
-to your Nixpkgs configuration (`~/.config/nixpkgs/config.nix`) and install it by running `nix-env -f '<nixpkgs>' -iA myEclipse` and afterward run Eclipse as usual. It is possible to find out which plugins are available for installation using `eclipseWithPlugins` by running:
-
-```ShellSession
-$ nix-env -f '<nixpkgs>' -qaP -A eclipses.plugins --description
-```
-
-If there is a need to install plugins that are not available in Nixpkgs then it may be possible to define these plugins outside Nixpkgs using the `buildEclipseUpdateSite` and `buildEclipsePlugin` functions found in the `nixpkgs.eclipses.plugins` attribute set. Use the `buildEclipseUpdateSite` function to install a plugin distributed as an Eclipse update site. This function takes `{ name, src }` as argument, where `src` indicates the Eclipse update site archive. All Eclipse features and plugins within the downloaded update site will be installed. When an update site archive is not available, then the `buildEclipsePlugin` function can be used to install a plugin that consists of a pair of feature and plugin JARs. This function takes an argument `{ name, srcFeature, srcPlugin }` where `srcFeature` and `srcPlugin` are the feature and plugin JARs, respectively.
-
-Expanding the previous example with two plugins using the above functions, we have:
-
-```nix
-packageOverrides = pkgs: {
-  myEclipse = with pkgs.eclipses; eclipseWithPlugins {
-    eclipse = eclipse-platform;
-    jvmArgs = [ "-Xmx2048m" ];
-    plugins = [
-      plugins.color-theme
-      (plugins.buildEclipsePlugin {
-        name = "myplugin1-1.0";
-        srcFeature = fetchurl {
-          url = "http://…/features/myplugin1.jar";
-          hash = "sha256-123…";
-        };
-        srcPlugin = fetchurl {
-          url = "http://…/plugins/myplugin1.jar";
-          hash = "sha256-123…";
-        };
-      });
-      (plugins.buildEclipseUpdateSite {
-        name = "myplugin2-1.0";
-        src = fetchurl {
-          stripRoot = false;
-          url = "http://…/myplugin2.zip";
-          hash = "sha256-123…";
-        };
-      });
-    ];
-  };
-}
-```

doc/builders/packages/elm.section.md

@@ -1,11 +0,0 @@
-# Elm {#sec-elm}
-
-To start a development environment, run:
-
-```ShellSession
-nix-shell -p elmPackages.elm elmPackages.elm-format
-```
-
-To update the Elm compiler, see `nixpkgs/pkgs/development/compilers/elm/README.md`.
-
-To package Elm applications, [read about elm2nix](https://github.com/hercules-ci/elm2nix#elm2nix).

doc/builders/packages/emacs.section.md

@@ -1,119 +0,0 @@
-# Emacs {#sec-emacs}
-
-## Configuring Emacs {#sec-emacs-config}
-
-The Emacs package comes with some extra helpers to make it easier to configure. `emacs.pkgs.withPackages` allows you to manage packages from ELPA. This means that you will not have to install that packages from within Emacs. For instance, if you wanted to use `company` `counsel`, `flycheck`, `ivy`, `magit`, `projectile`, and `use-package` you could use this as a `~/.config/nixpkgs/config.nix` override:
-
-```nix
-{
-  packageOverrides = pkgs: with pkgs; {
-    myEmacs = emacs.pkgs.withPackages (epkgs: (with epkgs.melpaStablePackages; [
-      company
-      counsel
-      flycheck
-      ivy
-      magit
-      projectile
-      use-package
-    ]));
-  }
-}
-```
-
-You can install it like any other packages via `nix-env -iA myEmacs`. However, this will only install those packages. It will not `configure` them for us. To do this, we need to provide a configuration file. Luckily, it is possible to do this from within Nix! By modifying the above example, we can make Emacs load a custom config file. The key is to create a package that provides a `default.el` file in `/share/emacs/site-start/`. Emacs knows to load this file automatically when it starts.
-
-```nix
-{
-  packageOverrides = pkgs: with pkgs; rec {
-    myEmacsConfig = writeText "default.el" ''
-      ;; initialize package
-
-      (require 'package)
-      (package-initialize 'noactivate)
-      (eval-when-compile
-        (require 'use-package))
-
-      ;; load some packages
-
-      (use-package company
-        :bind ("<C-tab>" . company-complete)
-        :diminish company-mode
-        :commands (company-mode global-company-mode)
-        :defer 1
-        :config
-        (global-company-mode))
-
-      (use-package counsel
-        :commands (counsel-descbinds)
-        :bind (([remap execute-extended-command] . counsel-M-x)
-               ("C-x C-f" . counsel-find-file)
-               ("C-c g" . counsel-git)
-               ("C-c j" . counsel-git-grep)
-               ("C-c k" . counsel-ag)
-               ("C-x l" . counsel-locate)
-               ("M-y" . counsel-yank-pop)))
-
-      (use-package flycheck
-        :defer 2
-        :config (global-flycheck-mode))
-
-      (use-package ivy
-        :defer 1
-        :bind (("C-c C-r" . ivy-resume)
-               ("C-x C-b" . ivy-switch-buffer)
-               :map ivy-minibuffer-map
-               ("C-j" . ivy-call))
-        :diminish ivy-mode
-        :commands ivy-mode
-        :config
-        (ivy-mode 1))
-
-      (use-package magit
-        :defer
-        :if (executable-find "git")
-        :bind (("C-x g" . magit-status)
-               ("C-x G" . magit-dispatch-popup))
-        :init
-        (setq magit-completing-read-function 'ivy-completing-read))
-
-      (use-package projectile
-        :commands projectile-mode
-        :bind-keymap ("C-c p" . projectile-command-map)
-        :defer 5
-        :config
-        (projectile-global-mode))
-    '';
-
-    myEmacs = emacs.pkgs.withPackages (epkgs: (with epkgs.melpaStablePackages; [
-      (runCommand "default.el" {} ''
-         mkdir -p $out/share/emacs/site-lisp
-         cp ${myEmacsConfig} $out/share/emacs/site-lisp/default.el
-       '')
-      company
-      counsel
-      flycheck
-      ivy
-      magit
-      projectile
-      use-package
-    ]));
-  };
-}
-```
-
-This provides a fairly full Emacs start file. It will load in addition to the user's personal config. You can always disable it by passing `-q` to the Emacs command.
-
-Sometimes `emacs.pkgs.withPackages` is not enough, as this package set has some priorities imposed on packages (with the lowest priority assigned to Melpa Unstable, and the highest for packages manually defined in `pkgs/top-level/emacs-packages.nix`). But you can't control these priorities when some package is installed as a dependency. You can override it on a per-package-basis, providing all the required dependencies manually, but it's tedious and there is always a possibility that an unwanted dependency will sneak in through some other package. To completely override such a package, you can use `overrideScope'`.
-
-```nix
-overrides = self: super: rec {
-  haskell-mode = self.melpaPackages.haskell-mode;
-  ...
-};
-((emacsPackagesFor emacs).overrideScope' overrides).withPackages
-  (p: with p; [
-    # here both these package will use haskell-mode of our own choice
-    ghc-mod
-    dante
-  ])
-```

doc/builders/packages/etc-files.section.md

@@ -1,18 +0,0 @@
-# /etc files {#etc}
-
-Certain calls in glibc require access to runtime files found in `/etc` such as `/etc/protocols` or `/etc/services` -- [getprotobyname](https://linux.die.net/man/3/getprotobyname) is one such function.
-
-On non-NixOS distributions these files are typically provided by packages (i.e., [netbase](https://packages.debian.org/sid/netbase)) if not already pre-installed in your distribution. This can cause non-reproducibility for code if they rely on these files being present.
-
-If [iana-etc](https://hydra.nixos.org/job/nixos/trunk-combined/nixpkgs.iana-etc.x86_64-linux) is part of your `buildInputs`, then it will set the environment variables `NIX_ETC_PROTOCOLS` and `NIX_ETC_SERVICES` to the corresponding files in the package through a setup hook.
-
-
-```bash
-> nix-shell -p iana-etc
-
-[nix-shell:~]$ env | grep NIX_ETC
-NIX_ETC_SERVICES=/nix/store/aj866hr8fad8flnggwdhrldm0g799ccz-iana-etc-20210225/etc/services
-NIX_ETC_PROTOCOLS=/nix/store/aj866hr8fad8flnggwdhrldm0g799ccz-iana-etc-20210225/etc/protocols
-```
-
-Nixpkg's version of [glibc](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/glibc/default.nix) has been patched to check for the existence of these environment variables. If the environment variables are *not* set, then it will attempt to find the files at the default location within `/etc`.

doc/builders/packages/firefox.section.md

@@ -1,55 +0,0 @@
-# Firefox {#sec-firefox}
-
-## Build wrapped Firefox with extensions and policies {#build-wrapped-firefox-with-extensions-and-policies}
-
-The `wrapFirefox` function allows to pass policies, preferences and extensions that are available to Firefox. With the help of `fetchFirefoxAddon` this allows to build a Firefox version that already comes with add-ons pre-installed:
-
-```nix
-{
-  # Nix firefox addons only work with the firefox-esr package.
-  myFirefox = wrapFirefox firefox-esr-unwrapped {
-    nixExtensions = [
-      (fetchFirefoxAddon {
-        name = "ublock"; # Has to be unique!
-        url = "https://addons.mozilla.org/firefox/downloads/file/3679754/ublock_origin-1.31.0-an+fx.xpi";
-        hash = "sha256-2e73AbmYZlZXCP5ptYVcFjQYdjDp4iPoEPEOSCVF5sA=";
-      })
-    ];
-
-    extraPolicies = {
-      CaptivePortal = false;
-      DisableFirefoxStudies = true;
-      DisablePocket = true;
-      DisableTelemetry = true;
-      DisableFirefoxAccounts = true;
-      FirefoxHome = {
-        Pocket = false;
-        Snippets = false;
-      };
-      UserMessaging = {
-        ExtensionRecommendations = false;
-        SkipOnboarding = true;
-      };
-      SecurityDevices = {
-        # Use a proxy module rather than `nixpkgs.config.firefox.smartcardSupport = true`
-        "PKCS#11 Proxy Module" = "${pkgs.p11-kit}/lib/p11-kit-proxy.so";
-      };
-    };
-
-    extraPrefs = ''
-      // Show more ssl cert infos
-      lockPref("security.identityblock.show_extended_validation", true);
-    '';
-  };
-}
-```
-
-If `nixExtensions != null`, then all manually installed add-ons will be uninstalled from your browser profile.
-To view available enterprise policies, visit [enterprise policies](https://github.com/mozilla/policy-templates#enterprisepoliciesenabled)
-or type into the Firefox URL bar: `about:policies#documentation`.
-Nix installed add-ons do not have a valid signature, which is why signature verification is disabled. This does not compromise security because downloaded add-ons are checksummed and manual add-ons can't be installed. Also, make sure that the `name` field of `fetchFirefoxAddon` is unique. If you remove an add-on from the `nixExtensions` array, rebuild and start Firefox: the removed add-on will be completely removed with all of its settings.
-
-## Troubleshooting {#sec-firefox-troubleshooting}
-If add-ons are marked as broken or the signature is invalid, make sure you have Firefox ESR installed. Normal Firefox does not provide the ability anymore to disable signature verification for add-ons thus nix add-ons get disabled by the normal Firefox binary.
-
-If add-ons do not appear installed despite being defined in your nix configuration file, reset the local add-on state of your Firefox profile by clicking `Help -> More Troubleshooting Information -> Refresh Firefox`. This can happen if you switch from manual add-on mode to nix add-on mode and then back to manual mode and then again to nix add-on mode.

doc/builders/packages/fish.section.md

@@ -1,50 +0,0 @@
-# Fish {#sec-fish}
-
-Fish is a "smart and user-friendly command line shell" with support for plugins.
-
-
-## Vendor Fish scripts {#sec-fish-vendor}
-
-Any package may ship its own Fish completions, configuration snippets, and
-functions. Those should be installed to
-`$out/share/fish/vendor_{completions,conf,functions}.d` respectively.
-
-When the `programs.fish.enable` and
-`programs.fish.vendor.{completions,config,functions}.enable` options from the
-NixOS Fish module are set to true, those paths are symlinked in the current
-system environment and automatically loaded by Fish.
-
-
-## Packaging Fish plugins {#sec-fish-plugins-pkg}
-
-While packages providing standalone executables belong to the top level,
-packages which have the sole purpose of extending Fish belong to the
-`fishPlugins` scope and should be registered in
-`pkgs/shells/fish/plugins/default.nix`.
-
-The `buildFishPlugin` utility function can be used to automatically copy Fish
-scripts from `$src/{completions,conf,conf.d,functions}` to the standard vendor
-installation paths. It also sets up the test environment so that the optional
-`checkPhase` is executed in a Fish shell with other already packaged plugins
-and package-local Fish functions specified in `checkPlugins` and
-`checkFunctionDirs` respectively.
-
-See `pkgs/shells/fish/plugins/pure.nix` for an example of Fish plugin package
-using `buildFishPlugin` and running unit tests with the `fishtape` test runner.
-
-
-## Fish wrapper {#sec-fish-wrapper}
-
-The `wrapFish` package is a wrapper around Fish which can be used to create
-Fish shells initialized with some plugins as well as completions, configuration
-snippets and functions sourced from the given paths. This provides a convenient
-way to test Fish plugins and scripts without having to alter the environment.
-
-```nix
-wrapFish {
-  pluginPkgs = with fishPlugins; [ pure foreign-env ];
-  completionDirs = [];
-  functionDirs = [];
-  confDirs = [ "/path/to/some/fish/init/dir/" ];
-}
-```

doc/builders/packages/fuse.section.md

@@ -1,45 +0,0 @@
-# FUSE {#sec-fuse}
-
-Some packages rely on
-[FUSE](https://www.kernel.org/doc/html/latest/filesystems/fuse.html) to provide
-support for additional filesystems not supported by the kernel.
-
-In general, FUSE software are primarily developed for Linux but many of them can
-also run on macOS. Nixpkgs supports FUSE packages on macOS, but it requires
-[macFUSE](https://osxfuse.github.io) to be installed outside of Nix. macFUSE
-currently isn't packaged in Nixpkgs mainly because it includes a kernel
-extension, which isn't supported by Nix outside of NixOS.
-
-If a package fails to run on macOS with an error message similar to the
-following, it's a likely sign that you need to have macFUSE installed.
-
-    dyld: Library not loaded: /usr/local/lib/libfuse.2.dylib
-    Referenced from: /nix/store/w8bi72bssv0bnxhwfw3xr1mvn7myf37x-sshfs-fuse-2.10/bin/sshfs
-    Reason: image not found
-    [1]    92299 abort      /nix/store/w8bi72bssv0bnxhwfw3xr1mvn7myf37x-sshfs-fuse-2.10/bin/sshfs
-
-Package maintainers may often encounter the following error when building FUSE
-packages on macOS:
-
-    checking for fuse.h... no
-    configure: error: No fuse.h found.
-
-This happens on autoconf based projects that use `AC_CHECK_HEADERS` or
-`AC_CHECK_LIBS` to detect libfuse, and will occur even when the `fuse` package
-is included in `buildInputs`. It happens because libfuse headers throw an error
-on macOS if the `FUSE_USE_VERSION` macro is undefined. Many projects do define
-`FUSE_USE_VERSION`, but only inside C source files. This results in the above
-error at configure time because the configure script would attempt to compile
-sample FUSE programs without defining `FUSE_USE_VERSION`.
-
-There are two possible solutions for this problem in Nixpkgs:
-
-1. Pass `FUSE_USE_VERSION` to the configure script by adding
-   `CFLAGS=-DFUSE_USE_VERSION=25` in `configureFlags`. The actual value would
-   have to match the definition used in the upstream source code.
-2. Remove `AC_CHECK_HEADERS` / `AC_CHECK_LIBS` for libfuse.
-
-However, a better solution might be to fix the build script upstream to use
-`PKG_CHECK_MODULES` instead. This approach wouldn't suffer from the problem that
-`AC_CHECK_HEADERS`/`AC_CHECK_LIBS` has at the price of introducing a dependency
-on pkg-config.

doc/builders/packages/ibus.section.md

@@ -1,38 +0,0 @@
-# ibus-engines.typing-booster {#sec-ibus-typing-booster}
-
-This package is an ibus-based completion method to speed up typing.
-
-## Activating the engine {#sec-ibus-typing-booster-activate}
-
-IBus needs to be configured accordingly to activate `typing-booster`. The configuration depends on the desktop manager in use. For detailed instructions, please refer to the [upstream docs](https://mike-fabian.github.io/ibus-typing-booster/).
-
-On NixOS, you need to explicitly enable `ibus` with given engines before customizing your desktop to use `typing-booster`. This can be achieved using the `ibus` module:
-
-```nix
-{ pkgs, ... }: {
-  i18n.inputMethod = {
-    enabled = "ibus";
-    ibus.engines = with pkgs.ibus-engines; [ typing-booster ];
-  };
-}
-```
-
-## Using custom hunspell dictionaries {#sec-ibus-typing-booster-customize-hunspell}
-
-The IBus engine is based on `hunspell` to support completion in many languages. By default, the dictionaries `de-de`, `en-us`, `fr-moderne` `es-es`, `it-it`, `sv-se` and `sv-fi` are in use. To add another dictionary, the package can be overridden like this:
-
-```nix
-ibus-engines.typing-booster.override { langs = [ "de-at" "en-gb" ]; }
-```
-
-_Note: each language passed to `langs` must be an attribute name in `pkgs.hunspellDicts`._
-
-## Built-in emoji picker {#sec-ibus-typing-booster-emoji-picker}
-
-The `ibus-engines.typing-booster` package contains a program named `emoji-picker`. To display all emojis correctly, a special font such as `noto-fonts-emoji` is needed:
-
-On NixOS, it can be installed using the following expression:
-
-```nix
-{ pkgs, ... }: { fonts.fonts = with pkgs; [ noto-fonts-emoji ]; }
-```

doc/builders/packages/index.xml

@@ -1,29 +0,0 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="chap-packages">
- <title>Packages</title>
- <para>
-  This chapter contains information about how to use and maintain the Nix expressions for a number of specific packages, such as the Linux kernel or X.org.
- </para>
- <xi:include href="citrix.section.xml" />
- <xi:include href="dlib.section.xml" />
- <xi:include href="eclipse.section.xml" />
- <xi:include href="elm.section.xml" />
- <xi:include href="emacs.section.xml" />
- <xi:include href="firefox.section.xml" />
- <xi:include href="fish.section.xml" />
- <xi:include href="fuse.section.xml" />
- <xi:include href="ibus.section.xml" />
- <xi:include href="kakoune.section.xml" />
- <xi:include href="linux.section.xml" />
- <xi:include href="locales.section.xml" />
- <xi:include href="etc-files.section.xml" />
- <xi:include href="nginx.section.xml" />
- <xi:include href="opengl.section.xml" />
- <xi:include href="shell-helpers.section.xml" />
- <xi:include href="steam.section.xml" />
- <xi:include href="cataclysm-dda.section.xml" />
- <xi:include href="urxvt.section.xml" />
- <xi:include href="weechat.section.xml" />
- <xi:include href="xorg.section.xml" />
-</chapter>

doc/builders/packages/kakoune.section.md

@@ -1,9 +0,0 @@
-# Kakoune {#sec-kakoune}
-
-Kakoune can be built to autoload plugins:
-
-```nix
-(kakoune.override {
-  plugins = with pkgs.kakounePlugins; [ parinfer-rust ];
-})
-```

doc/builders/packages/linux.section.md

@@ -1,41 +0,0 @@
-# Linux kernel {#sec-linux-kernel}
-
-The Nix expressions to build the Linux kernel are in [`pkgs/os-specific/linux/kernel`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/os-specific/linux/kernel).
-
-The function that builds the kernel has an argument `kernelPatches` which should be a list of `{name, patch, extraConfig}` attribute sets, where `name` is the name of the patch (which is included in the kernel’s `meta.description` attribute), `patch` is the patch itself (possibly compressed), and `extraConfig` (optional) is a string specifying extra options to be concatenated to the kernel configuration file (`.config`).
-
-The kernel derivation exports an attribute `features` specifying whether optional functionality is or isn’t enabled. This is used in NixOS to implement kernel-specific behaviour. For instance, if the kernel has the `iwlwifi` feature (i.e., has built-in support for Intel wireless chipsets), then NixOS doesn’t have to build the external `iwlwifi` package:
-
-```nix
-modulesTree = [kernel]
-  ++ pkgs.lib.optional (!kernel.features ? iwlwifi) kernelPackages.iwlwifi
-  ++ ...;
-```
-
-How to add a new (major) version of the Linux kernel to Nixpkgs:
-
-1.  Copy the old Nix expression (e.g., `linux-2.6.21.nix`) to the new one (e.g., `linux-2.6.22.nix`) and update it.
-
-2.  Add the new kernel to the `kernels` attribute set in `linux-kernels.nix` (e.g., create an attribute `kernel_2_6_22`).
-
-3.  Now we’re going to update the kernel configuration. First unpack the kernel. Then for each supported platform (`i686`, `x86_64`, `uml`) do the following:
-
-    1.  Make a copy from the old config (e.g., `config-2.6.21-i686-smp`) to the new one (e.g., `config-2.6.22-i686-smp`).
-
-    2.  Copy the config file for this platform (e.g., `config-2.6.22-i686-smp`) to `.config` in the kernel source tree.
-
-    3.  Run `make oldconfig ARCH={i386,x86_64,um}` and answer all questions. (For the uml configuration, also add `SHELL=bash`.) Make sure to keep the configuration consistent between platforms (i.e., don’t enable some feature on `i686` and disable it on `x86_64`).
-
-    4.  If needed, you can also run `make menuconfig`:
-
-        ```ShellSession
-        $ nix-env -f "<nixpkgs>" -iA ncurses
-        $ export NIX_CFLAGS_LINK=-lncurses
-        $ make menuconfig ARCH=arch
-        ```
-
-    5.  Copy `.config` over the new config file (e.g., `config-2.6.22-i686-smp`).
-
-4.  Test building the kernel: `nix-build -A linuxKernel.kernels.kernel_2_6_22`. If it compiles, ship it! For extra credit, try booting NixOS with it.
-
-5.  It may be that the new kernel requires updating the external kernel modules and kernel-dependent packages listed in the `linuxPackagesFor` function in `linux-kernels.nix` (such as the NVIDIA drivers, AUFS, etc.). If the updated packages aren’t backwards compatible with older kernels, you may need to keep the older versions around.

doc/builders/packages/locales.section.md

@@ -1,5 +0,0 @@
-# Locales {#locales}
-
-To allow simultaneous use of packages linked against different versions of `glibc` with different locale archive formats, Nixpkgs patches `glibc` to rely on `LOCALE_ARCHIVE` environment variable.
-
-On non-NixOS distributions, this variable is obviously not set. This can cause regressions in language support or even crashes in some Nixpkgs-provided programs. The simplest way to mitigate this problem is exporting the `LOCALE_ARCHIVE` variable pointing to `${glibcLocales}/lib/locale/locale-archive`. The drawback (and the reason this is not the default) is the relatively large (a hundred MiB) size of the full set of locales. It is possible to build a custom set of locales by overriding parameters `allLocales` and `locales` of the package.

doc/builders/packages/nginx.section.md

@@ -1,11 +0,0 @@
-# Nginx {#sec-nginx}
-
-[Nginx](https://nginx.org) is a reverse proxy and lightweight webserver.
-
-## ETags on static files served from the Nix store {#sec-nginx-etag}
-
-HTTP has a couple of different mechanisms for caching to prevent clients from having to download the same content repeatedly if a resource has not changed since the last time it was requested. When nginx is used as a server for static files, it implements the caching mechanism based on the [`Last-Modified`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Last-Modified) response header automatically; unfortunately, it works by using filesystem timestamps to determine the value of the `Last-Modified` header. This doesn't give the desired behavior when the file is in the Nix store because all file timestamps are set to 0 (for reasons related to build reproducibility).
-
-Fortunately, HTTP supports an alternative (and more effective) caching mechanism: the [`ETag`](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag) response header. The value of the `ETag` header specifies some identifier for the particular content that the server is sending (e.g., a hash). When a client makes a second request for the same resource, it sends that value back in an `If-None-Match` header. If the ETag value is unchanged, then the server does not need to resend the content.
-
-As of NixOS 19.09, the nginx package in Nixpkgs is patched such that when nginx serves a file out of `/nix/store`, the hash in the store path is used as the `ETag` header in the HTTP response, thus providing proper caching functionality. This happens automatically; you do not need to do modify any configuration to get this behavior.

doc/builders/packages/opengl.section.md

@@ -1,15 +0,0 @@
-# OpenGL {#sec-opengl}
-
-OpenGL support varies depending on which hardware is used and which drivers are available and loaded.
-
-Broadly, we support both GL vendors: Mesa and NVIDIA.
-
-## NixOS Desktop {#nixos-desktop}
-
-The NixOS desktop or other non-headless configurations are the primary target for OpenGL libraries and applications. The current solution for discovering which drivers are available is based on [libglvnd](https://gitlab.freedesktop.org/glvnd/libglvnd). `libglvnd` performs "vendor-neutral dispatch", trying a variety of techniques to find the system's GL implementation. In practice, this will be either via standard GLX for X11 users or EGL for Wayland users, and supporting either NVIDIA or Mesa extensions.
-
-## Nix on GNU/Linux {#nix-on-gnulinux}
-
-If you are using a non-NixOS GNU/Linux/X11 desktop with free software video drivers, consider launching OpenGL-dependent programs from Nixpkgs with Nixpkgs versions of `libglvnd` and `mesa.drivers` in `LD_LIBRARY_PATH`. For Mesa drivers, the Linux kernel version doesn't have to match nixpkgs.
-
-For proprietary video drivers, you might have luck with also adding the corresponding video driver package.

doc/builders/packages/shell-helpers.section.md

@@ -1,12 +0,0 @@
-# Interactive shell helpers {#sec-shell-helpers}
-
-Some packages provide the shell integration to be more useful. But unlike other systems, nix doesn't have a standard `share` directory location. This is why a bunch `PACKAGE-share` scripts are shipped that print the location of the corresponding shared folder. Current list of such packages is as following:
-
-- `fzf` : `fzf-share`
-
-E.g. `fzf` can then be used in the `.bashrc` like this:
-
-```bash
-source "$(fzf-share)/completion.bash"
-source "$(fzf-share)/key-bindings.bash"
-```

doc/builders/packages/steam.section.md

@@ -1,63 +0,0 @@
-# Steam {#sec-steam}
-
-## Steam in Nix {#sec-steam-nix}
-
-Steam is distributed as a `.deb` file, for now only as an i686 package (the amd64 package only has documentation). When unpacked, it has a script called `steam` that in Ubuntu (their target distro) would go to `/usr/bin`. When run for the first time, this script copies some files to the user's home, which include another script that is the ultimate responsible for launching the steam binary, which is also in `$HOME`.
-
-Nix problems and constraints:
-
-- We don't have `/bin/bash` and many scripts point there. Same thing for `/usr/bin/python`.
-- We don't have the dynamic loader in `/lib`.
-- The `steam.sh` script in `$HOME` cannot be patched, as it is checked and rewritten by steam.
-- The steam binary cannot be patched, it's also checked.
-
-The current approach to deploy Steam in NixOS is composing a FHS-compatible chroot environment, as documented [here](http://sandervanderburg.blogspot.nl/2013/09/composing-fhs-compatible-chroot.html). This allows us to have binaries in the expected paths without disrupting the system, and to avoid patching them to work in a non FHS environment.
-
-## How to play {#sec-steam-play}
-
-Use `programs.steam.enable = true;` if you want to add steam to `systemPackages` and also enable a few workarounds as well as Steam controller support or other Steam supported controllers such as the DualShock 4 or Nintendo Switch Pro Controller.
-
-## Troubleshooting {#sec-steam-troub}
-
-- **Steam fails to start. What do I do?**
-
-  Try to run
-
-  ```ShellSession
-  strace steam
-  ```
-
-  to see what is causing steam to fail.
-
-- **Using the FOSS Radeon or nouveau (nvidia) drivers**
-
-  - The `newStdcpp` parameter was removed since NixOS 17.09 and should not be needed anymore.
-  - Steam ships statically linked with a version of `libcrypto` that conflicts with the one dynamically loaded by radeonsi_dri.so. If you get the error:
-
-    ```
-    steam.sh: line 713: 7842 Segmentation fault (core dumped)
-    ```
-
-    have a look at [this pull request](https://github.com/NixOS/nixpkgs/pull/20269).
-
-- **Java**
-
-  1. There is no java in steam chrootenv by default. If you get a message like:
-
-    ```
-    /home/foo/.local/share/Steam/SteamApps/common/towns/towns.sh: line 1: java: command not found
-    ```
-
-    you need to add:
-
-    ```nix
-    steam.override { withJava = true; };
-    ```
-
-## steam-run {#sec-steam-run}
-
-The FHS-compatible chroot used for Steam can also be used to run other Linux games that expect a FHS environment. To use it, install the `steam-run` package and run the game with:
-
-```
-steam-run ./foo
-```

doc/builders/packages/urxvt.section.md

@@ -1,71 +0,0 @@
-# Urxvt {#sec-urxvt}
-
-Urxvt, also known as rxvt-unicode, is a highly customizable terminal emulator.
-
-## Configuring urxvt {#sec-urxvt-conf}
-
-In `nixpkgs`, urxvt is provided by the package `rxvt-unicode`. It can be configured to include your choice of plugins, reducing its closure size from the default configuration which includes all available plugins. To make use of this functionality, use an overlay or directly install an expression that overrides its configuration, such as:
-
-```nix
-rxvt-unicode.override {
-  configure = { availablePlugins, ... }: {
-    plugins = with availablePlugins; [ perls resize-font vtwheel ];
-  };
-}
-```
-
-If the `configure` function returns an attrset without the `plugins` attribute, `availablePlugins` will be used automatically.
-
-In order to add plugins but also keep all default plugins installed, it is possible to use the following method:
-
-```nix
-rxvt-unicode.override {
-  configure = { availablePlugins, ... }: {
-    plugins = (builtins.attrValues availablePlugins) ++ [ custom-plugin ];
-  };
-}
-```
-
-To get a list of all the plugins available, open the Nix REPL and run
-
-```ShellSession
-$ nix repl
-:l <nixpkgs>
-map (p: p.name) pkgs.rxvt-unicode.plugins
-```
-
-Alternatively, if your shell is bash or zsh and have completion enabled, simply type `nixpkgs.rxvt-unicode.plugins.<tab>`.
-
-In addition to `plugins` the options `extraDeps` and `perlDeps` can be used to install extra packages. `extraDeps` can be used, for example, to provide `xsel` (a clipboard manager) to the clipboard plugin, without installing it globally:
-
-```nix
-rxvt-unicode.override {
-  configure = { availablePlugins, ... }: {
-    pluginsDeps = [ xsel ];
-  };
-}
-```
-
-`perlDeps` is a handy way to provide Perl packages to your custom plugins (in `$HOME/.urxvt/ext`). For example, if you need `AnyEvent` you can do:
-
-```nix
-rxvt-unicode.override {
-  configure = { availablePlugins, ... }: {
-    perlDeps = with perlPackages; [ AnyEvent ];
-  };
-}
-```
-
-## Packaging urxvt plugins {#sec-urxvt-pkg}
-
-Urxvt plugins resides in `pkgs/applications/misc/rxvt-unicode-plugins`. To add a new plugin, create an expression in a subdirectory and add the package to the set in `pkgs/applications/misc/rxvt-unicode-plugins/default.nix`.
-
-A plugin can be any kind of derivation, the only requirement is that it should always install perl scripts in `$out/lib/urxvt/perl`. Look for existing plugins for examples.
-
-If the plugin is itself a Perl package that needs to be imported from other plugins or scripts, add the following passthrough:
-
-```nix
-passthru.perlPackages = [ "self" ];
-```
-
-This will make the urxvt wrapper pick up the dependency and set up the Perl path accordingly.

doc/builders/packages/weechat.section.md

@@ -1,85 +0,0 @@
-# WeeChat {#sec-weechat}
-
-WeeChat can be configured to include your choice of plugins, reducing its closure size from the default configuration which includes all available plugins. To make use of this functionality, install an expression that overrides its configuration, such as:
-
-```nix
-weechat.override {configure = {availablePlugins, ...}: {
-    plugins = with availablePlugins; [ python perl ];
-  }
-}
-```
-
-If the `configure` function returns an attrset without the `plugins` attribute, `availablePlugins` will be used automatically.
-
-The plugins currently available are `python`, `perl`, `ruby`, `guile`, `tcl` and `lua`.
-
-The Python and Perl plugins allows the addition of extra libraries. For instance, the `inotify.py` script in `weechat-scripts` requires D-Bus or libnotify, and the `fish.py` script requires `pycrypto`. To use these scripts, use the plugin's `withPackages` attribute:
-
-```nix
-weechat.override { configure = {availablePlugins, ...}: {
-    plugins = with availablePlugins; [
-            (python.withPackages (ps: with ps; [ pycrypto python-dbus ]))
-        ];
-    };
-}
-```
-
-In order to also keep all default plugins installed, it is possible to use the following method:
-
-```nix
-weechat.override { configure = { availablePlugins, ... }: {
-  plugins = builtins.attrValues (availablePlugins // {
-    python = availablePlugins.python.withPackages (ps: with ps; [ pycrypto python-dbus ]);
-  });
-}; }
-```
-
-WeeChat allows to set defaults on startup using the `--run-command`. The `configure` method can be used to pass commands to the program:
-
-```nix
-weechat.override {
-  configure = { availablePlugins, ... }: {
-    init = ''
-      /set foo bar
-      /server add libera irc.libera.chat
-    '';
-  };
-}
-```
-
-Further values can be added to the list of commands when running `weechat --run-command "your-commands"`.
-
-Additionally, it's possible to specify scripts to be loaded when starting `weechat`. These will be loaded before the commands from `init`:
-
-```nix
-weechat.override {
-  configure = { availablePlugins, ... }: {
-    scripts = with pkgs.weechatScripts; [
-      weechat-xmpp weechat-matrix-bridge wee-slack
-    ];
-    init = ''
-      /set plugins.var.python.jabber.key "val"
-    '':
-  };
-}
-```
-
-In `nixpkgs` there's a subpackage which contains derivations for WeeChat scripts. Such derivations expect a `passthru.scripts` attribute, which contains a list of all scripts inside the store path. Furthermore, all scripts have to live in `$out/share`. An exemplary derivation looks like this:
-
-```nix
-{ stdenv, fetchurl }:
-
-stdenv.mkDerivation {
-  name = "exemplary-weechat-script";
-  src = fetchurl {
-    url = "https://scripts.tld/your-scripts.tar.gz";
-    hash = "...";
-  };
-  passthru.scripts = [ "foo.py" "bar.lua" ];
-  installPhase = ''
-    mkdir $out/share
-    cp foo.py $out/share
-    cp bar.lua $out/share
-  '';
-}
-```

doc/builders/packages/xorg.section.md

@@ -1,34 +0,0 @@
-# X.org {#sec-xorg}
-
-The Nix expressions for the X.org packages reside in `pkgs/servers/x11/xorg/default.nix`. This file is automatically generated from lists of tarballs in an X.org release. As such it should not be modified directly; rather, you should modify the lists, the generator script or the file `pkgs/servers/x11/xorg/overrides.nix`, in which you can override or add to the derivations produced by the generator.
-
-## Katamari Tarballs {#katamari-tarballs}
-
-X.org upstream releases used to include [katamari](https://en.wiktionary.org/wiki/%E3%81%8B%E3%81%9F%E3%81%BE%E3%82%8A) releases, which included a holistic recommended version for each tarball, up until 7.7. To create a list of tarballs in a katamari release:
-
-```ShellSession
-export release="X11R7.7"
-export url="mirror://xorg/$release/src/everything/"
-cat $(PRINT_PATH=1 nix-prefetch-url $url | tail -n 1) \
-  | perl -e 'while (<>) { if (/(href|HREF)="([^"]*.bz2)"/) { print "$ENV{'url'}$2\n"; }; }' \
-  | sort > "tarballs-$release.list"
-```
-
-## Individual Tarballs {#individual-tarballs}
-
-The upstream release process for [X11R7.8](https://x.org/wiki/Releases/7.8/) does not include a planned katamari. Instead, each component of X.org is released as its own tarball. We maintain `pkgs/servers/x11/xorg/tarballs.list` as a list of tarballs for each individual package. This list includes X.org core libraries and protocol descriptions, extra newer X11 interface libraries, like `xorg.libxcb`, and classic utilities which are largely unused but still available if needed, like `xorg.imake`.
-
-## Generating Nix Expressions {#generating-nix-expressions}
-
-The generator is invoked as follows:
-
-```ShellSession
-cd pkgs/servers/x11/xorg
-<tarballs.list perl ./generate-expr-from-tarballs.pl
-```
-
-For each of the tarballs in the `.list` files, the script downloads it, unpacks it, and searches its `configure.ac` and `*.pc.in` files for dependencies. This information is used to generate `default.nix`. The generator caches downloaded tarballs between runs. Pay close attention to the `NOT FOUND: $NAME` messages at the end of the run, since they may indicate missing dependencies. (Some might be optional dependencies, however.)
-
-## Overriding the Generator {#overriding-the-generator}
-
-If the expression for a package requires derivation attributes that the generator cannot figure out automatically (say, `patches` or a `postInstall` hook), you should modify `pkgs/servers/x11/xorg/overrides.nix`.

doc/builders/special.xml

@@ -1,11 +0,0 @@
-<chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="chap-special">
- <title>Special builders</title>
- <para>
-  This chapter describes several special builders.
- </para>
- <xi:include href="special/fhs-environments.section.xml" />
- <xi:include href="special/mkshell.section.xml" />
- <xi:include href="special/darwin-builder.section.xml" />
-</chapter>

doc/builders/special/darwin-builder.section.md

@@ -1,63 +0,0 @@
-# darwin.builder {#sec-darwin-builder}
-
-`darwin.builder` provides a way to bootstrap a Linux builder on a macOS machine.
-
-This requires macOS version 12.4 or later.
-
-This also requires that port 22 on your machine is free (since Nix does not
-permit specifying a non-default SSH port for builders).
-
-You will also need to be a trusted user for your Nix installation.  In other
-words, your `/etc/nix/nix.conf` should have something like:
-
-```
-extra-trusted-users = <your username goes here>
-```
-
-To launch the builder, run the following flake:
-
-```ShellSession
-$ nix run nixpkgs#darwin.builder
-```
-
-That will prompt you to enter your `sudo` password:
-
-```
-+ sudo --reset-timestamp /nix/store/…-install-credentials.sh ./keys
-Password:
-```
-
-… so that it can install a private key used to `ssh` into the build server.
-After that the script will launch the virtual machine and automatically log you
-in as the `builder` user:
-
-```
-<<< Welcome to NixOS 22.11.20220901.1bd8d11 (aarch64) - ttyAMA0 >>>
-
-Run 'nixos-help' for the NixOS manual.
-
-nixos login: builder (automatic login)
-
-
-[builder@nixos:~]$
-```
-
-> Note: When you need to stop the VM, run `shutdown now` as the `builder` user.
-
-To delegate builds to the remote builder, add the following options to your
-`nix.conf` file:
-
-```
-# - Replace ${ARCH} with either aarch64 or x86_64 to match your host machine
-# - Replace ${MAX_JOBS} with the maximum number of builds (pick 4 if you're not sure)
-builders = ssh-ng://builder@localhost ${ARCH}-linux /etc/nix/builder_ed25519 ${MAX_JOBS} - - - c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSUpCV2N4Yi9CbGFxdDFhdU90RStGOFFVV3JVb3RpQzVxQkorVXVFV2RWQ2Igcm9vdEBuaXhvcwo=
-
-# Not strictly necessary, but this will reduce your disk utilization
-builders-use-substitutes = true
-```
-
-… and then restart your Nix daemon to apply the change:
-
-```ShellSession
-$ sudo launchctl kickstart -k system/org.nixos.nix-daemon
-```

doc/builders/special/fhs-environments.section.md

@@ -1,49 +0,0 @@
-# buildFHSUserEnv {#sec-fhs-environments}
-
-`buildFHSUserEnv` provides a way to build and run FHS-compatible lightweight sandboxes. It creates an isolated root with bound `/nix/store`, so its footprint in terms of disk space needed is quite small. This allows one to run software which is hard or unfeasible to patch for NixOS -- 3rd-party source trees with FHS assumptions, games distributed as tarballs, software with integrity checking and/or external self-updated binaries. It uses Linux namespaces feature to create temporary lightweight environments which are destroyed after all child processes exit, without root user rights requirement. Accepted arguments are:
-
-- `name`
-        Environment name.
-- `targetPkgs`
-        Packages to be installed for the main host's architecture (i.e. x86_64 on x86_64 installations). Along with libraries binaries are also installed.
-- `multiPkgs`
-        Packages to be installed for all architectures supported by a host (i.e. i686 and x86_64 on x86_64 installations). Only libraries are installed by default.
-- `extraBuildCommands`
-        Additional commands to be executed for finalizing the directory structure.
-- `extraBuildCommandsMulti`
-        Like `extraBuildCommands`, but executed only on multilib architectures.
-- `extraOutputsToInstall`
-        Additional derivation outputs to be linked for both target and multi-architecture packages.
-- `extraInstallCommands`
-        Additional commands to be executed for finalizing the derivation with runner script.
-- `runScript`
-        A command that would be executed inside the sandbox and passed all the command line arguments. It defaults to `bash`.
-- `profile`
-        Optional script for `/etc/profile` within the sandbox.
-
-One can create a simple environment using a `shell.nix` like that:
-
-```nix
-{ pkgs ? import <nixpkgs> {} }:
-
-(pkgs.buildFHSUserEnv {
-  name = "simple-x11-env";
-  targetPkgs = pkgs: (with pkgs;
-    [ udev
-      alsa-lib
-    ]) ++ (with pkgs.xorg;
-    [ libX11
-      libXcursor
-      libXrandr
-    ]);
-  multiPkgs = pkgs: (with pkgs;
-    [ udev
-      alsa-lib
-    ]);
-  runScript = "bash";
-}).env
-```
-
-Running `nix-shell` would then drop you into a shell with these libraries and binaries available. You can use this to run closed-source applications which expect FHS structure without hassles: simply change `runScript` to the application path, e.g. `./bin/start.sh` -- relative paths are supported.
-
-Additionally, the FHS builder links all relocated gsettings-schemas (the glib setup-hook moves them to `share/gsettings-schemas/${name}/glib-2.0/schemas`) to their standard FHS location. This means you don't need to wrap binaries with `wrapGAppsHook`.

doc/builders/special/mkshell.section.md

@@ -1,37 +0,0 @@
-# pkgs.mkShell {#sec-pkgs-mkShell}
-
-`pkgs.mkShell` is a specialized `stdenv.mkDerivation` that removes some
-repetition when using it with `nix-shell` (or `nix develop`).
-
-## Usage {#sec-pkgs-mkShell-usage}
-
-Here is a common usage example:
-
-```nix
-{ pkgs ? import <nixpkgs> {} }:
-pkgs.mkShell {
-  packages = [ pkgs.gnumake ];
-
-  inputsFrom = [ pkgs.hello pkgs.gnutar ];
-
-  shellHook = ''
-    export DEBUG=1
-  '';
-}
-```
-
-## Attributes
-
-* `name` (default: `nix-shell`). Set the name of the derivation.
-* `packages` (default: `[]`). Add executable packages to the `nix-shell` environment.
-* `inputsFrom` (default: `[]`). Add build dependencies of the listed derivations to the `nix-shell` environment.
-* `shellHook` (default: `""`). Bash statements that are executed by `nix-shell`.
-
-... all the attributes of `stdenv.mkDerivation`.
-
-## Building the shell
-
-This derivation output will contain a text file that contains a reference to
-all the build inputs. This is useful in CI where we want to make sure that
-every derivation, and its dependencies, build properly. Or when creating a GC
-root so that the build dependencies don't get garbage-collected.

doc/builders/testers.chapter.md

@@ -1,211 +0,0 @@
-# Testers {#chap-testers}
-This chapter describes several testing builders which are available in the <literal>testers</literal> namespace.
-
-## `hasPkgConfigModule` {#tester-hasPkgConfigModule}
-
-Checks whether a package exposes a certain `pkg-config` module.
-
-Example:
-
-```nix
-passthru.tests.pkg-config = testers.hasPkgConfigModule {
-  package = finalAttrs.finalPackage;
-  moduleName = "libfoo";
-}
-```
-
-## `testVersion` {#tester-testVersion}
-
-Checks the command output contains the specified version
-
-Although simplistic, this test assures that the main program
-can run. While there's no substitute for a real test case,
-it does catch dynamic linking errors and such. It also provides
-some protection against accidentally building the wrong version,
-for example when using an 'old' hash in a fixed-output derivation.
-
-Examples:
-
-```nix
-passthru.tests.version = testers.testVersion { package = hello; };
-
-passthru.tests.version = testers.testVersion {
-  package = seaweedfs;
-  command = "weed version";
-};
-
-passthru.tests.version = testers.testVersion {
-  package = key;
-  command = "KeY --help";
-  # Wrong '2.5' version in the code. Drop on next version.
-  version = "2.5";
-};
-
-passthru.tests.version = testers.testVersion {
-  package = ghr;
-  # The output needs to contain the 'version' string without any prefix or suffix.
-  version = "v${version}";
-};
-```
-
-## `testBuildFailure` {#tester-testBuildFailure}
-
-Make sure that a build does not succeed. This is useful for testing testers.
-
-This returns a derivation with an override on the builder, with the following effects:
-
- - Fail the build when the original builder succeeds
- - Move `$out` to `$out/result`, if it exists (assuming `out` is the default output)
- - Save the build log to `$out/testBuildFailure.log` (same)
-
-Example:
-
-```nix
-runCommand "example" {
-  failed = testers.testBuildFailure (runCommand "fail" {} ''
-    echo ok-ish >$out
-    echo failing though
-    exit 3
-  '');
-} ''
-  grep -F 'ok-ish' $failed/result
-  grep -F 'failing though' $failed/testBuildFailure.log
-  [[ 3 = $(cat $failed/testBuildFailure.exit) ]]
-  touch $out
-'';
-```
-
-While `testBuildFailure` is designed to keep changes to the original builder's
-environment to a minimum, some small changes are inevitable.
-
- - The file `$TMPDIR/testBuildFailure.log` is present. It should not be deleted.
- - `stdout` and `stderr` are a pipe instead of a tty. This could be improved.
- - One or two extra processes are present in the sandbox during the original
-   builder's execution.
- - The derivation and output hashes are different, but not unusual.
- - The derivation includes a dependency on `buildPackages.bash` and
-   `expect-failure.sh`, which is built to include a transitive dependency on
-   `buildPackages.coreutils` and possibly more. These are not added to `PATH`
-   or any other environment variable, so they should be hard to observe.
-
-## `testEqualContents` {#tester-equalContents}
-
-Check that two paths have the same contents.
-
-Example:
-
-```nix
-testers.testEqualContents {
-  assertion = "sed -e performs replacement";
-  expected = writeText "expected" ''
-    foo baz baz
-  '';
-  actual = runCommand "actual" {
-    # not really necessary for a package that's in stdenv
-    nativeBuildInputs = [ gnused ];
-    base = writeText "base" ''
-      foo bar baz
-    '';
-  } ''
-    sed -e 's/bar/baz/g' $base >$out
-  '';
-}
-```
-
-## `testEqualDerivation` {#tester-testEqualDerivation}
-
-Checks that two packages produce the exact same build instructions.
-
-This can be used to make sure that a certain difference of configuration,
-such as the presence of an overlay does not cause a cache miss.
-
-When the derivations are equal, the return value is an empty file.
-Otherwise, the build log explains the difference via `nix-diff`.
-
-Example:
-
-```nix
-testers.testEqualDerivation
-  "The hello package must stay the same when enabling checks."
-  hello
-  (hello.overrideAttrs(o: { doCheck = true; }))
-```
-
-## `invalidateFetcherByDrvHash` {#tester-invalidateFetcherByDrvHash}
-
-Use the derivation hash to invalidate the output via name, for testing.
-
-Type: `(a@{ name, ... } -> Derivation) -> a -> Derivation`
-
-Normally, fixed output derivations can and should be cached by their output
-hash only, but for testing we want to re-fetch everytime the fetcher changes.
-
-Changes to the fetcher become apparent in the drvPath, which is a hash of
-how to fetch, rather than a fixed store path.
-By inserting this hash into the name, we can make sure to re-run the fetcher
-every time the fetcher changes.
-
-This relies on the assumption that Nix isn't clever enough to reuse its
-database of local store contents to optimize fetching.
-
-You might notice that the "salted" name derives from the normal invocation,
-not the final derivation. `invalidateFetcherByDrvHash` has to invoke the fetcher
-function twice: once to get a derivation hash, and again to produce the final
-fixed output derivation.
-
-Example:
-
-```nix
-tests.fetchgit = testers.invalidateFetcherByDrvHash fetchgit {
-  name = "nix-source";
-  url = "https://github.com/NixOS/nix";
-  rev = "9d9dbe6ed05854e03811c361a3380e09183f4f4a";
-  hash = "sha256-7DszvbCNTjpzGRmpIVAWXk20P0/XTrWZ79KSOGLrUWY=";
-};
-```
-
-## `nixosTest` {#tester-nixosTest}
-
-Run a NixOS VM network test using this evaluation of Nixpkgs.
-
-NOTE: This function is primarily for external use. NixOS itself uses `make-test-python.nix` directly. Packages defined in Nixpkgs [reuse NixOS tests via `nixosTests`, plural](#ssec-nixos-tests-linking).
-
-It is mostly equivalent to the function `import ./make-test-python.nix` from the
-[NixOS manual](https://nixos.org/nixos/manual/index.html#sec-nixos-tests),
-except that the current application of Nixpkgs (`pkgs`) will be used, instead of
-letting NixOS invoke Nixpkgs anew.
-
-If a test machine needs to set NixOS options under `nixpkgs`, it must set only the
-`nixpkgs.pkgs` option.
-
-### Parameter
-
-A [NixOS VM test network](https://nixos.org/nixos/manual/index.html#sec-nixos-tests), or path to it. Example:
-
-```nix
-{
-  name = "my-test";
-  nodes = {
-    machine1 = { lib, pkgs, nodes, ... }: {
-      environment.systemPackages = [ pkgs.hello ];
-      services.foo.enable = true;
-    };
-    # machine2 = ...;
-  };
-  testScript = ''
-    start_all()
-    machine1.wait_for_unit("foo.service")
-    machine1.succeed("hello | foo-send")
-  '';
-}
-```
-
-### Result
-
-A derivation that runs the VM test.
-
-Notable attributes:
-
- * `nodes`: the evaluated NixOS configurations. Useful for debugging and exploring the configuration.
-
- * `driverInteractive`: a script that launches an interactive Python session in the context of the `testScript`.

doc/builders/trivial-builders.chapter.md

@@ -1,223 +0,0 @@
-# Trivial builders {#chap-trivial-builders}
-
-Nixpkgs provides a couple of functions that help with building derivations. The most important one, `stdenv.mkDerivation`, has already been documented above. The following functions wrap `stdenv.mkDerivation`, making it easier to use in certain cases.
-
-## `runCommand` {#trivial-builder-runCommand}
-
-This takes three arguments, `name`, `env`, and `buildCommand`. `name` is just the name that Nix will append to the store path in the same way that `stdenv.mkDerivation` uses its `name` attribute. `env` is an attribute set specifying environment variables that will be set for this derivation. These attributes are then passed to the wrapped `stdenv.mkDerivation`. `buildCommand` specifies the commands that will be run to create this derivation. Note that you will need to create `$out` for Nix to register the command as successful.
-
-An example of using `runCommand` is provided below.
-
-```nix
-(import <nixpkgs> {}).runCommand "my-example" {} ''
-  echo My example command is running
-
-  mkdir $out
-
-  echo I can write data to the Nix store > $out/message
-
-  echo I can also run basic commands like:
-
-  echo ls
-  ls
-
-  echo whoami
-  whoami
-
-  echo date
-  date
-''
-```
-
-## `runCommandCC` {#trivial-builder-runCommandCC}
-
-This works just like `runCommand`. The only difference is that it also provides a C compiler in `buildCommand`'s environment. To minimize your dependencies, you should only use this if you are sure you will need a C compiler as part of running your command.
-
-## `runCommandLocal` {#trivial-builder-runCommandLocal}
-
-Variant of `runCommand` that forces the derivation to be built locally, it is not substituted. This is intended for very cheap commands (<1s execution time). It saves on the network round-trip and can speed up a build.
-
-::: {.note}
-This sets [`allowSubstitutes` to `false`](https://nixos.org/nix/manual/#adv-attr-allowSubstitutes), so only use `runCommandLocal` if you are certain the user will always have a builder for the `system` of the derivation. This should be true for most trivial use cases (e.g., just copying some files to a different location or adding symlinks) because there the `system` is usually the same as `builtins.currentSystem`.
-:::
-
-## `writeTextFile`, `writeText`, `writeTextDir`, `writeScript`, `writeScriptBin` {#trivial-builder-writeText}
-
-These functions write `text` to the Nix store. This is useful for creating scripts from Nix expressions. `writeTextFile` takes an attribute set and expects two arguments, `name` and `text`. `name` corresponds to the name used in the Nix store path. `text` will be the contents of the file. You can also set `executable` to true to make this file have the executable bit set.
-
-Many more commands wrap `writeTextFile` including `writeText`, `writeTextDir`, `writeScript`, and `writeScriptBin`. These are convenience functions over `writeTextFile`.
-
-Here are a few examples:
-```nix
-# Writes my-file to /nix/store/<store path>
-writeTextFile {
-  name = "my-file";
-  text = ''
-    Contents of File
-  '';
-}
-# See also the `writeText` helper function below.
-
-# Writes executable my-file to /nix/store/<store path>/bin/my-file
-writeTextFile {
-  name = "my-file";
-  text = ''
-    Contents of File
-  '';
-  executable = true;
-  destination = "/bin/my-file";
-}
-# Writes contents of file to /nix/store/<store path>
-writeText "my-file"
-  ''
-  Contents of File
-  '';
-# Writes contents of file to /nix/store/<store path>/share/my-file
-writeTextDir "share/my-file"
-  ''
-  Contents of File
-  '';
-# Writes my-file to /nix/store/<store path> and makes executable
-writeScript "my-file"
-  ''
-  Contents of File
-  '';
-# Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
-writeScriptBin "my-file"
-  ''
-  Contents of File
-  '';
-# Writes my-file to /nix/store/<store path> and makes executable.
-writeShellScript "my-file"
-  ''
-  Contents of File
-  '';
-# Writes my-file to /nix/store/<store path>/bin/my-file and makes executable.
-writeShellScriptBin "my-file"
-  ''
-  Contents of File
-  '';
-
-```
-
-## `concatTextFile`, `concatText`, `concatScript` {#trivial-builder-concatText}
-
-These functions concatenate `files` to the Nix store in a single file. This is useful for configuration files structured in lines of text. `concatTextFile` takes an attribute set and expects two arguments, `name` and `files`. `name` corresponds to the name used in the Nix store path. `files` will be the files to be concatenated. You can also set `executable` to true to make this file have the executable bit set.
-`concatText` and`concatScript` are simple wrappers over `concatTextFile`.
-
-Here are a few examples:
-```nix
-
-# Writes my-file to /nix/store/<store path>
-concatTextFile {
-  name = "my-file";
-  files = [ drv1 "${drv2}/path/to/file" ];
-}
-# See also the `concatText` helper function below.
-
-# Writes executable my-file to /nix/store/<store path>/bin/my-file
-concatTextFile {
-  name = "my-file";
-  files = [ drv1 "${drv2}/path/to/file" ];
-  executable = true;
-  destination = "/bin/my-file";
-}
-# Writes contents of files to /nix/store/<store path>
-concatText "my-file" [ file1 file2 ]
-
-# Writes contents of files to /nix/store/<store path>
-concatScript "my-file" [ file1 file2 ]
-```
-
-## `writeShellApplication` {#trivial-builder-writeShellApplication}
-
-This can be used to easily produce a shell script that has some dependencies (`runtimeInputs`). It automatically sets the `PATH` of the script to contain all of the listed inputs, sets some sanity shellopts (`errexit`, `nounset`, `pipefail`), and checks the resulting script with [`shellcheck`](https://github.com/koalaman/shellcheck).
-
-For example, look at the following code:
-
-```nix
-writeShellApplication {
-  name = "show-nixos-org";
-
-  runtimeInputs = [ curl w3m ];
-
-  text = ''
-    curl -s 'https://nixos.org' | w3m -dump -T text/html
-  '';
-}
-```
-
-Unlike with normal `writeShellScriptBin`, there is no need to manually write out `${curl}/bin/curl`, setting the PATH
-was handled by `writeShellApplication`. Moreover, the script is being checked with `shellcheck` for more strict
-validation.
-
-## `symlinkJoin` {#trivial-builder-symlinkJoin}
-
-This can be used to put many derivations into the same directory structure. It works by creating a new derivation and adding symlinks to each of the paths listed. It expects two arguments, `name`, and `paths`. `name` is the name used in the Nix store path for the created derivation. `paths` is a list of paths that will be symlinked. These paths can be to Nix store derivations or any other subdirectory contained within.
-Here is an example:
-```nix
-# adds symlinks of hello and stack to current build and prints "links added"
-symlinkJoin { name = "myexample"; paths = [ pkgs.hello pkgs.stack ]; postBuild = "echo links added"; }
-```
-This creates a derivation with a directory structure like the following:
-```
-/nix/store/sglsr5g079a5235hy29da3mq3hv8sjmm-myexample
-|-- bin
-|   |-- hello -> /nix/store/qy93dp4a3rqyn2mz63fbxjg228hffwyw-hello-2.10/bin/hello
-|   `-- stack -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/bin/stack
-`-- share
-    |-- bash-completion
-    |   `-- completions
-    |       `-- stack -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/share/bash-completion/completions/stack
-    |-- fish
-    |   `-- vendor_completions.d
-    |       `-- stack.fish -> /nix/store/6lzdpxshx78281vy056lbk553ijsdr44-stack-2.1.3.1/share/fish/vendor_completions.d/stack.fish
-...
-```
-
-## `writeReferencesToFile` {#trivial-builder-writeReferencesToFile}
-
-Writes the closure of transitive dependencies to a file.
-
-This produces the equivalent of `nix-store -q --requisites`.
-
-For example,
-
-```nix
-writeReferencesToFile (writeScriptBin "hi" ''${hello}/bin/hello'')
-```
-
-produces an output path `/nix/store/<hash>-runtime-deps` containing
-
-```nix
-/nix/store/<hash>-hello-2.10
-/nix/store/<hash>-hi
-/nix/store/<hash>-libidn2-2.3.0
-/nix/store/<hash>-libunistring-0.9.10
-/nix/store/<hash>-glibc-2.32-40
-```
-
-You can see that this includes `hi`, the original input path,
-`hello`, which is a direct reference, but also
-the other paths that are indirectly required to run `hello`.
-
-## `writeDirectReferencesToFile` {#trivial-builder-writeDirectReferencesToFile}
-
-Writes the set of references to the output file, that is, their immediate dependencies.
-
-This produces the equivalent of `nix-store -q --references`.
-
-For example,
-
-```nix
-writeDirectReferencesToFile (writeScriptBin "hi" ''${hello}/bin/hello'')
-```
-
-produces an output path `/nix/store/<hash>-runtime-references` containing
-
-```nix
-/nix/store/<hash>-hello-2.10
-```
-
-but none of `hello`'s dependencies because those are not referenced directly
-by `hi`'s output.

doc/coding-conventions.xml

@@ -0,0 +1,922 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="chap-conventions">
+ <title>Coding conventions</title>
+ <section xml:id="sec-syntax">
+  <title>Syntax</title>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     Use 2 spaces of indentation per indentation level in Nix expressions, 4
+     spaces in shell scripts.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Do not use tab characters, i.e. configure your editor to use soft tabs.
+     For instance, use <literal>(setq-default indent-tabs-mode nil)</literal>
+     in Emacs. Everybody has different tab settings so it’s asking for
+     trouble.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Use <literal>lowerCamelCase</literal> for variable names, not
+     <literal>UpperCamelCase</literal>. Note, this rule does not apply to
+     package attribute names, which instead follow the rules in
+     <xref linkend="sec-package-naming"/>.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Function calls with attribute set arguments are written as
+<programlisting>
+foo {
+  arg = ...;
+}
+</programlisting>
+     not
+<programlisting>
+foo
+{
+  arg = ...;
+}
+</programlisting>
+     Also fine is
+<programlisting>
+foo { arg = ...; }
+</programlisting>
+     if it's a short call.
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     In attribute sets or lists that span multiple lines, the attribute names
+     or list elements should be aligned:
+<programlisting>
+# A long list.
+list =
+  [ elem1
+    elem2
+    elem3
+  ];
+
+# A long attribute set.
+attrs =
+  { attr1 = short_expr;
+    attr2 =
+      if true then big_expr else big_expr;
+  };
+
+# Alternatively:
+attrs = {
+  attr1 = short_expr;
+  attr2 =
+    if true then big_expr else big_expr;
+};
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Short lists or attribute sets can be written on one line:
+<programlisting>
+# A short list.
+list = [ elem1 elem2 elem3 ];
+
+# A short set.
+attrs = { x = 1280; y = 1024; };
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Breaking in the middle of a function argument can give hard-to-read code,
+     like
+<programlisting>
+someFunction { x = 1280;
+  y = 1024; } otherArg
+  yetAnotherArg
+</programlisting>
+     (especially if the argument is very large, spanning multiple lines).
+    </para>
+    <para>
+     Better:
+<programlisting>
+someFunction
+  { x = 1280; y = 1024; }
+  otherArg
+  yetAnotherArg
+</programlisting>
+     or
+<programlisting>
+let res = { x = 1280; y = 1024; };
+in someFunction res otherArg yetAnotherArg
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     The bodies of functions, asserts, and withs are not indented to prevent a
+     lot of superfluous indentation levels, i.e.
+<programlisting>
+{ arg1, arg2 }:
+assert system == "i686-linux";
+stdenv.mkDerivation { ...
+</programlisting>
+     not
+<programlisting>
+{ arg1, arg2 }:
+  assert system == "i686-linux";
+    stdenv.mkDerivation { ...
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Function formal arguments are written as:
+<programlisting>
+{ arg1, arg2, arg3 }:
+</programlisting>
+     but if they don't fit on one line they're written as:
+<programlisting>
+{ arg1, arg2, arg3
+, arg4, ...
+, # Some comment...
+  argN
+}:
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     Functions should list their expected arguments as precisely as possible.
+     That is, write
+<programlisting>
+{ stdenv, fetchurl, perl }: <replaceable>...</replaceable>
+</programlisting>
+     instead of
+<programlisting>
+args: with args; <replaceable>...</replaceable>
+</programlisting>
+     or
+<programlisting>
+{ stdenv, fetchurl, perl, ... }: <replaceable>...</replaceable>
+</programlisting>
+    </para>
+    <para>
+     For functions that are truly generic in the number of arguments (such as
+     wrappers around <varname>mkDerivation</varname>) that have some required
+     arguments, you should write them using an <literal>@</literal>-pattern:
+<programlisting>
+{ stdenv, doCoverageAnalysis ? false, ... } @ args:
+
+stdenv.mkDerivation (args // {
+  <replaceable>...</replaceable> if doCoverageAnalysis then "bla" else "" <replaceable>...</replaceable>
+})
+</programlisting>
+     instead of
+<programlisting>
+args:
+
+args.stdenv.mkDerivation (args // {
+  <replaceable>...</replaceable> if args ? doCoverageAnalysis &amp;&amp; args.doCoverageAnalysis then "bla" else "" <replaceable>...</replaceable>
+})
+</programlisting>
+    </para>
+   </listitem>
+  </itemizedlist>
+ </section>
+ <section xml:id="sec-package-naming">
+  <title>Package naming</title>
+
+  <para>
+   In Nixpkgs, there are generally three different names associated with a
+   package:
+   <itemizedlist>
+    <listitem>
+     <para>
+      The <varname>name</varname> attribute of the derivation (excluding the
+      version part). This is what most users see, in particular when using
+      <command>nix-env</command>.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      The variable name used for the instantiated package in
+      <filename>all-packages.nix</filename>, and when passing it as a
+      dependency to other functions. Typically this is called the
+      <emphasis>package attribute name</emphasis>. This is what Nix expression
+      authors see. It can also be used when installing using <command>nix-env
+      -iA</command>.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      The filename for (the directory containing) the Nix expression.
+     </para>
+    </listitem>
+   </itemizedlist>
+   Most of the time, these are the same. For instance, the package
+   <literal>e2fsprogs</literal> has a <varname>name</varname> attribute
+   <literal>"e2fsprogs-<replaceable>version</replaceable>"</literal>, is bound
+   to the variable name <varname>e2fsprogs</varname> in
+   <filename>all-packages.nix</filename>, and the Nix expression is in
+   <filename>pkgs/os-specific/linux/e2fsprogs/default.nix</filename>.
+  </para>
+
+  <para>
+   There are a few naming guidelines:
+   <itemizedlist>
+    <listitem>
+     <para>
+      Generally, try to stick to the upstream package name.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      Don’t use uppercase letters in the <literal>name</literal> attribute
+      — e.g., <literal>"mplayer-1.0rc2"</literal> instead of
+      <literal>"MPlayer-1.0rc2"</literal>.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      The version part of the <literal>name</literal> attribute
+      <emphasis>must</emphasis> start with a digit (following a dash) — e.g.,
+      <literal>"hello-0.3.1rc2"</literal>.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      If a package is not a release but a commit from a repository, then the
+      version part of the name <emphasis>must</emphasis> be the date of that
+      (fetched) commit. The date must be in <literal>"YYYY-MM-DD"</literal>
+      format. Also append <literal>"unstable"</literal> to the name - e.g.,
+      <literal>"pkgname-unstable-2014-09-23"</literal>.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      Dashes in the package name should be preserved in new variable names,
+      rather than converted to underscores or camel cased — e.g.,
+      <varname>http-parser</varname> instead of <varname>http_parser</varname>
+      or <varname>httpParser</varname>. The hyphenated style is preferred in
+      all three package names.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      If there are multiple versions of a package, this should be reflected in
+      the variable names in <filename>all-packages.nix</filename>, e.g.
+      <varname>json-c-0-9</varname> and <varname>json-c-0-11</varname>. If
+      there is an obvious “default” version, make an attribute like
+      <literal>json-c = json-c-0-9;</literal>. See also
+      <xref linkend="sec-versioning" />
+     </para>
+    </listitem>
+   </itemizedlist>
+  </para>
+ </section>
+ <section xml:id="sec-organisation">
+  <title>File naming and organisation</title>
+
+  <para>
+   Names of files and directories should be in lowercase, with dashes between
+   words — not in camel case. For instance, it should be
+   <filename>all-packages.nix</filename>, not
+   <filename>allPackages.nix</filename> or
+   <filename>AllPackages.nix</filename>.
+  </para>
+
+  <section xml:id="sec-hierarchy">
+   <title>Hierarchy</title>
+
+   <para>
+    Each package should be stored in its own directory somewhere in the
+    <filename>pkgs/</filename> tree, i.e. in
+    <filename>pkgs/<replaceable>category</replaceable>/<replaceable>subcategory</replaceable>/<replaceable>...</replaceable>/<replaceable>pkgname</replaceable></filename>.
+    Below are some rules for picking the right category for a package. Many
+    packages fall under several categories; what matters is the
+    <emphasis>primary</emphasis> purpose of a package. For example, the
+    <literal>libxml2</literal> package builds both a library and some tools;
+    but it’s a library foremost, so it goes under
+    <filename>pkgs/development/libraries</filename>.
+   </para>
+
+   <para>
+    When in doubt, consider refactoring the <filename>pkgs/</filename> tree,
+    e.g. creating new categories or splitting up an existing category.
+   </para>
+
+   <variablelist>
+    <varlistentry>
+     <term>
+      If it’s used to support <emphasis>software development</emphasis>:
+     </term>
+     <listitem>
+      <variablelist>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>library</emphasis> used by other packages:
+        </term>
+        <listitem>
+         <para>
+          <filename>development/libraries</filename> (e.g.
+          <filename>libxml2</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>compiler</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>development/compilers</filename> (e.g.
+          <filename>gcc</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s an <emphasis>interpreter</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>development/interpreters</filename> (e.g.
+          <filename>guile</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s a (set of) development <emphasis>tool(s)</emphasis>:
+        </term>
+        <listitem>
+         <variablelist>
+          <varlistentry>
+           <term>
+            If it’s a <emphasis>parser generator</emphasis> (including lexers):
+           </term>
+           <listitem>
+            <para>
+             <filename>development/tools/parsing</filename> (e.g.
+             <filename>bison</filename>, <filename>flex</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+          <varlistentry>
+           <term>
+            If it’s a <emphasis>build manager</emphasis>:
+           </term>
+           <listitem>
+            <para>
+             <filename>development/tools/build-managers</filename> (e.g.
+             <filename>gnumake</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+          <varlistentry>
+           <term>
+            Else:
+           </term>
+           <listitem>
+            <para>
+             <filename>development/tools/misc</filename> (e.g.
+             <filename>binutils</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+         </variablelist>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         Else:
+        </term>
+        <listitem>
+         <para>
+          <filename>development/misc</filename>
+         </para>
+        </listitem>
+       </varlistentry>
+      </variablelist>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s a (set of) <emphasis>tool(s)</emphasis>:
+     </term>
+     <listitem>
+      <para>
+       (A tool is a relatively small program, especially one intended to be
+       used non-interactively.)
+      </para>
+      <variablelist>
+       <varlistentry>
+        <term>
+         If it’s for <emphasis>networking</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/networking</filename> (e.g.
+          <filename>wget</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s for <emphasis>text processing</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/text</filename> (e.g. <filename>diffutils</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>system utility</emphasis>, i.e., something related or essential to the operation of a system:
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/system</filename> (e.g. <filename>cron</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s an <emphasis>archiver</emphasis> (which may include a compression function):
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/archivers</filename> (e.g. <filename>zip</filename>,
+          <filename>tar</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>compression</emphasis> program:
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/compression</filename> (e.g.
+          <filename>gzip</filename>, <filename>bzip2</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>security</emphasis>-related program:
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/security</filename> (e.g. <filename>nmap</filename>,
+          <filename>gnupg</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         Else:
+        </term>
+        <listitem>
+         <para>
+          <filename>tools/misc</filename>
+         </para>
+        </listitem>
+       </varlistentry>
+      </variablelist>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s a <emphasis>shell</emphasis>:
+     </term>
+     <listitem>
+      <para>
+       <filename>shells</filename> (e.g. <filename>bash</filename>)
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s a <emphasis>server</emphasis>:
+     </term>
+     <listitem>
+      <variablelist>
+       <varlistentry>
+        <term>
+         If it’s a web server:
+        </term>
+        <listitem>
+         <para>
+          <filename>servers/http</filename> (e.g.
+          <filename>apache-httpd</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s an implementation of the X Windowing System:
+        </term>
+        <listitem>
+         <para>
+          <filename>servers/x11</filename> (e.g. <filename>xorg</filename> —
+          this includes the client libraries and programs)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         Else:
+        </term>
+        <listitem>
+         <para>
+          <filename>servers/misc</filename>
+         </para>
+        </listitem>
+       </varlistentry>
+      </variablelist>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s a <emphasis>desktop environment</emphasis>:
+     </term>
+     <listitem>
+      <para>
+       <filename>desktops</filename> (e.g. <filename>kde</filename>,
+       <filename>gnome</filename>, <filename>enlightenment</filename>)
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s a <emphasis>window manager</emphasis>:
+     </term>
+     <listitem>
+      <para>
+       <filename>applications/window-managers</filename> (e.g.
+       <filename>awesome</filename>, <filename>stumpwm</filename>)
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s an <emphasis>application</emphasis>:
+     </term>
+     <listitem>
+      <para>
+       A (typically large) program with a distinct user interface, primarily
+       used interactively.
+      </para>
+      <variablelist>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>version management system</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>applications/version-management</filename> (e.g.
+          <filename>subversion</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s for <emphasis>video playback / editing</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>applications/video</filename> (e.g.
+          <filename>vlc</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s for <emphasis>graphics viewing / editing</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>applications/graphics</filename> (e.g.
+          <filename>gimp</filename>)
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s for <emphasis>networking</emphasis>:
+        </term>
+        <listitem>
+         <variablelist>
+          <varlistentry>
+           <term>
+            If it’s a <emphasis>mailreader</emphasis>:
+           </term>
+           <listitem>
+            <para>
+             <filename>applications/networking/mailreaders</filename> (e.g.
+             <filename>thunderbird</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+          <varlistentry>
+           <term>
+            If it’s a <emphasis>newsreader</emphasis>:
+           </term>
+           <listitem>
+            <para>
+             <filename>applications/networking/newsreaders</filename> (e.g.
+             <filename>pan</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+          <varlistentry>
+           <term>
+            If it’s a <emphasis>web browser</emphasis>:
+           </term>
+           <listitem>
+            <para>
+             <filename>applications/networking/browsers</filename> (e.g.
+             <filename>firefox</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+          <varlistentry>
+           <term>
+            Else:
+           </term>
+           <listitem>
+            <para>
+             <filename>applications/networking/misc</filename>
+            </para>
+           </listitem>
+          </varlistentry>
+         </variablelist>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         Else:
+        </term>
+        <listitem>
+         <para>
+          <filename>applications/misc</filename>
+         </para>
+        </listitem>
+       </varlistentry>
+      </variablelist>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s <emphasis>data</emphasis> (i.e., does not have a straight-forward executable semantics):
+     </term>
+     <listitem>
+      <variablelist>
+       <varlistentry>
+        <term>
+         If it’s a <emphasis>font</emphasis>:
+        </term>
+        <listitem>
+         <para>
+          <filename>data/fonts</filename>
+         </para>
+        </listitem>
+       </varlistentry>
+       <varlistentry>
+        <term>
+         If it’s related to <emphasis>SGML/XML processing</emphasis>:
+        </term>
+        <listitem>
+         <variablelist>
+          <varlistentry>
+           <term>
+            If it’s an <emphasis>XML DTD</emphasis>:
+           </term>
+           <listitem>
+            <para>
+             <filename>data/sgml+xml/schemas/xml-dtd</filename> (e.g.
+             <filename>docbook</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+          <varlistentry>
+           <term>
+            If it’s an <emphasis>XSLT stylesheet</emphasis>:
+           </term>
+           <listitem>
+            <para>
+             (Okay, these are executable...)
+            </para>
+            <para>
+             <filename>data/sgml+xml/stylesheets/xslt</filename> (e.g.
+             <filename>docbook-xsl</filename>)
+            </para>
+           </listitem>
+          </varlistentry>
+         </variablelist>
+        </listitem>
+       </varlistentry>
+      </variablelist>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      If it’s a <emphasis>game</emphasis>:
+     </term>
+     <listitem>
+      <para>
+       <filename>games</filename>
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      Else:
+     </term>
+     <listitem>
+      <para>
+       <filename>misc</filename>
+      </para>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </section>
+
+  <section xml:id="sec-versioning">
+   <title>Versioning</title>
+
+   <para>
+    Because every version of a package in Nixpkgs creates a potential
+    maintenance burden, old versions of a package should not be kept unless
+    there is a good reason to do so. For instance, Nixpkgs contains several
+    versions of GCC because other packages don’t build with the latest
+    version of GCC. Other examples are having both the latest stable and latest
+    pre-release version of a package, or to keep several major releases of an
+    application that differ significantly in functionality.
+   </para>
+
+   <para>
+    If there is only one version of a package, its Nix expression should be
+    named <filename>e2fsprogs/default.nix</filename>. If there are multiple
+    versions, this should be reflected in the filename, e.g.
+    <filename>e2fsprogs/1.41.8.nix</filename> and
+    <filename>e2fsprogs/1.41.9.nix</filename>. The version in the filename
+    should leave out unnecessary detail. For instance, if we keep the latest
+    Firefox 2.0.x and 3.5.x versions in Nixpkgs, they should be named
+    <filename>firefox/2.0.nix</filename> and
+    <filename>firefox/3.5.nix</filename>, respectively (which, at a given
+    point, might contain versions <literal>2.0.0.20</literal> and
+    <literal>3.5.4</literal>). If a version requires many auxiliary files, you
+    can use a subdirectory for each version, e.g.
+    <filename>firefox/2.0/default.nix</filename> and
+    <filename>firefox/3.5/default.nix</filename>.
+   </para>
+
+   <para>
+    All versions of a package <emphasis>must</emphasis> be included in
+    <filename>all-packages.nix</filename> to make sure that they evaluate
+    correctly.
+   </para>
+  </section>
+ </section>
+ <section xml:id="sec-sources">
+  <title>Fetching Sources</title>
+
+  <para>
+   There are multiple ways to fetch a package source in nixpkgs. The general
+   guideline is that you should package sources with a high degree of
+   availability. Right now there is only one fetcher which has mirroring
+   support and that is <literal>fetchurl</literal>. Note that you should also
+   prefer protocols which have a corresponding proxy environment variable.
+  </para>
+
+  <para>
+   You can find many source fetch helpers in
+   <literal>pkgs/build-support/fetch*</literal>.
+  </para>
+
+  <para>
+   In the file <literal>pkgs/top-level/all-packages.nix</literal> you can find
+   fetch helpers, these have names on the form <literal>fetchFrom*</literal>.
+   The intention of these are to provide snapshot fetches but using the same
+   api as some of the version controlled fetchers from
+   <literal>pkgs/build-support/</literal>. As an example going from bad to
+   good:
+   <itemizedlist>
+    <listitem>
+     <para>
+      Bad: Uses <literal>git://</literal> which won't be proxied.
+<programlisting>
+src = fetchgit {
+  url = "git://github.com/NixOS/nix.git";
+  rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
+  sha256 = "1cw5fszffl5pkpa6s6wjnkiv6lm5k618s32sp60kvmvpy7a2v9kg";
+}
+</programlisting>
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      Better: This is ok, but an archive fetch will still be faster.
+<programlisting>
+src = fetchgit {
+  url = "https://github.com/NixOS/nix.git";
+  rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
+  sha256 = "1cw5fszffl5pkpa6s6wjnkiv6lm5k618s32sp60kvmvpy7a2v9kg";
+}
+</programlisting>
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      Best: Fetches a snapshot archive and you get the rev you want.
+<programlisting>
+src = fetchFromGitHub {
+  owner = "NixOS";
+  repo = "nix";
+  rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
+  sha256 = "04yri911rj9j19qqqn6m82266fl05pz98inasni0vxr1cf1gdgv9";
+}
+</programlisting>
+     </para>
+    </listitem>
+   </itemizedlist>
+  </para>
+ </section>
+ <section xml:id="sec-patches">
+  <title>Patches</title>
+
+  <para>
+   Patches available online should be retrieved using
+   <literal>fetchpatch</literal>.
+  </para>
+
+  <para>
+<programlisting>
+patches = [
+  (fetchpatch {
+    name = "fix-check-for-using-shared-freetype-lib.patch";
+    url = "http://git.ghostscript.com/?p=ghostpdl.git;a=patch;h=8f5d285";
+    sha256 = "1f0k043rng7f0rfl9hhb89qzvvksqmkrikmm38p61yfx51l325xr";
+  })
+];
+</programlisting>
+  </para>
+
+  <para>
+   Otherwise, you can add a <literal>.patch</literal> file to the
+   <literal>nixpkgs</literal> repository. In the interest of keeping our
+   maintenance burden to a minimum, only patches that are unique to
+   <literal>nixpkgs</literal> should be added in this way.
+  </para>
+
+  <para>
+<programlisting>
+patches = [ ./0001-changes.patch ];
+</programlisting>
+  </para>
+
+  <para>
+   If you do need to do create this sort of patch file, one way to do so is
+   with git:
+   <orderedlist>
+    <listitem>
+     <para>
+      Move to the root directory of the source code you're patching.
+<screen>
+$ cd the/program/source</screen>
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      If a git repository is not already present, create one and stage all of
+      the source files.
+<screen>
+$ git init
+$ git add .</screen>
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      Edit some files to make whatever changes need to be included in the
+      patch.
+     </para>
+    </listitem>
+    <listitem>
+     <para>
+      Use git to create a diff, and pipe the output to a patch file:
+<screen>
+$ git diff > nixpkgs/pkgs/the/package/0001-changes.patch</screen>
+     </para>
+    </listitem>
+   </orderedlist>
+  </para>
+ </section>
+</chapter>

doc/configuration.xml

@@ -0,0 +1,463 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="chap-packageconfig">
+ <title>Global configuration</title>
+ <para>
+  Nix comes with certain defaults about what packages can and cannot be
+  installed, based on a package's metadata. By default, Nix will prevent
+  installation if any of the following criteria are true:
+ </para>
+ <itemizedlist>
+  <listitem>
+   <para>
+    The package is thought to be broken, and has had its
+    <literal>meta.broken</literal> set to <literal>true</literal>.
+   </para>
+  </listitem>
+  <listitem>
+   <para>
+    The package's <literal>meta.license</literal> is set to a license which is
+    considered to be unfree.
+   </para>
+  </listitem>
+  <listitem>
+   <para>
+    The package has known security vulnerabilities but has not or can not be
+    updated for some reason, and a list of issues has been entered in to the
+    package's <literal>meta.knownVulnerabilities</literal>.
+   </para>
+  </listitem>
+ </itemizedlist>
+ <para>
+  Note that all this is checked during evaluation already, and the check
+  includes any package that is evaluated. In particular, all build-time
+  dependencies are checked. <literal>nix-env -qa</literal> will (attempt to)
+  hide any packages that would be refused.
+ </para>
+ <para>
+  Each of these criteria can be altered in the nixpkgs configuration.
+ </para>
+ <para>
+  The nixpkgs configuration for a NixOS system is set in the
+  <literal>configuration.nix</literal>, as in the following example:
+<programlisting>
+{
+  nixpkgs.config = {
+    allowUnfree = true;
+  };
+}
+</programlisting>
+  However, this does not allow unfree software for individual users. Their
+  configurations are managed separately.
+ </para>
+ <para>
+  A user's of nixpkgs configuration is stored in a user-specific configuration
+  file located at <filename>~/.config/nixpkgs/config.nix</filename>. For
+  example:
+<programlisting>
+{
+  allowUnfree = true;
+}
+</programlisting>
+ </para>
+ <para>
+  Note that we are not able to test or build unfree software on Hydra due to
+  policy. Most unfree licenses prohibit us from either executing or
+  distributing the software.
+ </para>
+ <section xml:id="sec-allow-broken">
+  <title>Installing broken packages</title>
+
+  <para>
+   There are two ways to try compiling a package which has been marked as
+   broken.
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     For allowing the build of a broken package once, you can use an
+     environment variable for a single invocation of the nix tools:
+<programlisting>$ export NIXPKGS_ALLOW_BROKEN=1</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     For permanently allowing broken packages to be built, you may add
+     <literal>allowBroken = true;</literal> to your user's configuration file,
+     like this:
+<programlisting>
+{
+  allowBroken = true;
+}
+</programlisting>
+    </para>
+   </listitem>
+  </itemizedlist>
+ </section>
+ <section xml:id="sec-allow-unfree">
+  <title>Installing unfree packages</title>
+
+  <para>
+   There are several ways to tweak how Nix handles a package which has been
+   marked as unfree.
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     To temporarily allow all unfree packages, you can use an environment
+     variable for a single invocation of the nix tools:
+<programlisting>$ export NIXPKGS_ALLOW_UNFREE=1</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     It is possible to permanently allow individual unfree packages, while
+     still blocking unfree packages by default using the
+     <literal>allowUnfreePredicate</literal> configuration option in the user
+     configuration file.
+    </para>
+    <para>
+     This option is a function which accepts a package as a parameter, and
+     returns a boolean. The following example configuration accepts a package
+     and always returns false:
+<programlisting>
+{
+  allowUnfreePredicate = (pkg: false);
+}
+</programlisting>
+    </para>
+    <para>
+     A more useful example, the following configuration allows only allows
+     flash player and visual studio code:
+<programlisting>
+{
+  allowUnfreePredicate = (pkg: elem (builtins.parseDrvName pkg.name).name [ "flashplayer" "vscode" ]);
+}
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     It is also possible to whitelist and blacklist licenses that are
+     specifically acceptable or not acceptable, using
+     <literal>whitelistedLicenses</literal> and
+     <literal>blacklistedLicenses</literal>, respectively.
+    </para>
+    <para>
+     The following example configuration whitelists the licenses
+     <literal>amd</literal> and <literal>wtfpl</literal>:
+<programlisting>
+{
+  whitelistedLicenses = with stdenv.lib.licenses; [ amd wtfpl ];
+}
+</programlisting>
+    </para>
+    <para>
+     The following example configuration blacklists the <literal>gpl3</literal>
+     and <literal>agpl3</literal> licenses:
+<programlisting>
+{
+  blacklistedLicenses = with stdenv.lib.licenses; [ agpl3 gpl3 ];
+}
+</programlisting>
+    </para>
+   </listitem>
+  </itemizedlist>
+
+  <para>
+   A complete list of licenses can be found in the file
+   <filename>lib/licenses.nix</filename> of the nixpkgs tree.
+  </para>
+ </section>
+ <section xml:id="sec-allow-insecure">
+  <title>Installing insecure packages</title>
+
+  <para>
+   There are several ways to tweak how Nix handles a package which has been
+   marked as insecure.
+  </para>
+
+  <itemizedlist>
+   <listitem>
+    <para>
+     To temporarily allow all insecure packages, you can use an environment
+     variable for a single invocation of the nix tools:
+<programlisting>$ export NIXPKGS_ALLOW_INSECURE=1</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     It is possible to permanently allow individual insecure packages, while
+     still blocking other insecure packages by default using the
+     <literal>permittedInsecurePackages</literal> configuration option in the
+     user configuration file.
+    </para>
+    <para>
+     The following example configuration permits the installation of the
+     hypothetically insecure package <literal>hello</literal>, version
+     <literal>1.2.3</literal>:
+<programlisting>
+{
+  permittedInsecurePackages = [
+    "hello-1.2.3"
+  ];
+}
+</programlisting>
+    </para>
+   </listitem>
+   <listitem>
+    <para>
+     It is also possible to create a custom policy around which insecure
+     packages to allow and deny, by overriding the
+     <literal>allowInsecurePredicate</literal> configuration option.
+    </para>
+    <para>
+     The <literal>allowInsecurePredicate</literal> option is a function which
+     accepts a package and returns a boolean, much like
+     <literal>allowUnfreePredicate</literal>.
+    </para>
+    <para>
+     The following configuration example only allows insecure packages with
+     very short names:
+<programlisting>
+{
+  allowInsecurePredicate = (pkg: (builtins.stringLength (builtins.parseDrvName pkg.name).name) &lt;= 5);
+}
+</programlisting>
+    </para>
+    <para>
+     Note that <literal>permittedInsecurePackages</literal> is only checked if
+     <literal>allowInsecurePredicate</literal> is not specified.
+    </para>
+   </listitem>
+  </itemizedlist>
+ </section>
+<!--============================================================-->
+ <section xml:id="sec-modify-via-packageOverrides">
+  <title>Modify packages via <literal>packageOverrides</literal></title>
+
+  <para>
+   You can define a function called <varname>packageOverrides</varname> in your
+   local <filename>~/.config/nixpkgs/config.nix</filename> to override nix
+   packages. It must be a function that takes pkgs as an argument and return
+   modified set of packages.
+<programlisting>
+{
+  packageOverrides = pkgs: rec {
+    foo = pkgs.foo.override { ... };
+  };
+}
+</programlisting>
+  </para>
+ </section>
+ <section xml:id="sec-declarative-package-management">
+  <title>Declarative Package Management</title>
+
+  <section xml:id="sec-building-environment">
+   <title>Build an environment</title>
+
+   <para>
+    Using <literal>packageOverrides</literal>, it is possible to manage
+    packages declaratively. This means that we can list all of our desired
+    packages within a declarative Nix expression. For example, to have
+    <literal>aspell</literal>, <literal>bc</literal>,
+    <literal>ffmpeg</literal>, <literal>coreutils</literal>,
+    <literal>gdb</literal>, <literal>nixUnstable</literal>,
+    <literal>emscripten</literal>, <literal>jq</literal>,
+    <literal>nox</literal>, and <literal>silver-searcher</literal>, we could
+    use the following in <filename>~/.config/nixpkgs/config.nix</filename>:
+   </para>
+
+<screen>
+{
+  packageOverrides = pkgs: with pkgs; {
+    myPackages = pkgs.buildEnv {
+      name = "my-packages";
+      paths = [ aspell bc coreutils gdb ffmpeg nixUnstable emscripten jq nox silver-searcher ];
+    };
+  };
+}
+    </screen>
+
+   <para>
+    To install it into our environment, you can just run <literal>nix-env -iA
+    nixpkgs.myPackages</literal>. If you want to load the packages to be built
+    from a working copy of <literal>nixpkgs</literal> you just run
+    <literal>nix-env -f. -iA myPackages</literal>. To explore what's been
+    installed, just look through <filename>~/.nix-profile/</filename>. You can
+    see that a lot of stuff has been installed. Some of this stuff is useful
+    some of it isn't. Let's tell Nixpkgs to only link the stuff that we want:
+   </para>
+
+<screen>
+{
+  packageOverrides = pkgs: with pkgs; {
+    myPackages = pkgs.buildEnv {
+      name = "my-packages";
+      paths = [ aspell bc coreutils gdb ffmpeg nixUnstable emscripten jq nox silver-searcher ];
+      pathsToLink = [ "/share" "/bin" ];
+    };
+  };
+}
+    </screen>
+
+   <para>
+    <literal>pathsToLink</literal> tells Nixpkgs to only link the paths listed
+    which gets rid of the extra stuff in the profile. <filename>/bin</filename>
+    and <filename>/share</filename> are good defaults for a user environment,
+    getting rid of the clutter. If you are running on Nix on MacOS, you may
+    want to add another path as well, <filename>/Applications</filename>, that
+    makes GUI apps available.
+   </para>
+  </section>
+
+  <section xml:id="sec-getting-documentation">
+   <title>Getting documentation</title>
+
+   <para>
+    After building that new environment, look through
+    <filename>~/.nix-profile</filename> to make sure everything is there that
+    we wanted. Discerning readers will note that some files are missing. Look
+    inside <filename>~/.nix-profile/share/man/man1/</filename> to verify this.
+    There are no man pages for any of the Nix tools! This is because some
+    packages like Nix have multiple outputs for things like documentation (see
+    section 4). Let's make Nix install those as well.
+   </para>
+
+<screen>
+{
+  packageOverrides = pkgs: with pkgs; {
+    myPackages = pkgs.buildEnv {
+      name = "my-packages";
+      paths = [ aspell bc coreutils ffmpeg nixUnstable emscripten jq nox silver-searcher ];
+      pathsToLink = [ "/share/man" "/share/doc" /bin" ];
+      extraOutputsToInstall = [ "man" "doc" ];
+    };
+  };
+}
+    </screen>
+
+   <para>
+    This provides us with some useful documentation for using our packages.
+    However, if we actually want those manpages to be detected by man, we need
+    to set up our environment. This can also be managed within Nix expressions.
+   </para>
+
+<screen>
+{
+  packageOverrides = pkgs: with pkgs; rec {
+    myProfile = writeText "my-profile" ''
+export PATH=$HOME/.nix-profile/bin:/nix/var/nix/profiles/default/bin:/sbin:/bin:/usr/sbin:/usr/bin
+export MANPATH=$HOME/.nix-profile/share/man:/nix/var/nix/profiles/default/share/man:/usr/share/man
+    '';
+    myPackages = pkgs.buildEnv {
+      name = "my-packages";
+      paths = [
+        (runCommand "profile" {} ''
+mkdir -p $out/etc/profile.d
+cp ${myProfile} $out/etc/profile.d/my-profile.sh
+        '')
+        aspell
+        bc
+        coreutils
+        ffmpeg
+        man
+        nixUnstable
+        emscripten
+        jq
+        nox
+        silver-searcher
+      ];
+      pathsToLink = [ "/share/man" "/share/doc" /bin" "/etc" ];
+      extraOutputsToInstall = [ "man" "doc" ];
+    };
+  };
+}
+    </screen>
+
+   <para>
+    For this to work fully, you must also have this script sourced when you are
+    logged in. Try adding something like this to your
+    <filename>~/.profile</filename> file:
+   </para>
+
+<screen>
+#!/bin/sh
+if [ -d $HOME/.nix-profile/etc/profile.d ]; then
+  for i in $HOME/.nix-profile/etc/profile.d/*.sh; do
+    if [ -r $i ]; then
+      . $i
+    fi
+  done
+fi
+    </screen>
+
+   <para>
+    Now just run <literal>source $HOME/.profile</literal> and you can starting
+    loading man pages from your environent.
+   </para>
+  </section>
+
+  <section xml:id="sec-gnu-info-setup">
+   <title>GNU info setup</title>
+
+   <para>
+    Configuring GNU info is a little bit trickier than man pages. To work
+    correctly, info needs a database to be generated. This can be done with
+    some small modifications to our environment scripts.
+   </para>
+
+<screen>
+{
+  packageOverrides = pkgs: with pkgs; rec {
+    myProfile = writeText "my-profile" ''
+export PATH=$HOME/.nix-profile/bin:/nix/var/nix/profiles/default/bin:/sbin:/bin:/usr/sbin:/usr/bin
+export MANPATH=$HOME/.nix-profile/share/man:/nix/var/nix/profiles/default/share/man:/usr/share/man
+export INFOPATH=$HOME/.nix-profile/share/info:/nix/var/nix/profiles/default/share/info:/usr/share/info
+    '';
+    myPackages = pkgs.buildEnv {
+      name = "my-packages";
+      paths = [
+        (runCommand "profile" {} ''
+mkdir -p $out/etc/profile.d
+cp ${myProfile} $out/etc/profile.d/my-profile.sh
+        '')
+        aspell
+        bc
+        coreutils
+        ffmpeg
+        man
+        nixUnstable
+        emscripten
+        jq
+        nox
+        silver-searcher
+        texinfoInteractive
+      ];
+      pathsToLink = [ "/share/man" "/share/doc" "/share/info" "/bin" "/etc" ];
+      extraOutputsToInstall = [ "man" "doc" "info" ];
+      postBuild = ''
+          if [ -x $out/bin/install-info -a -w $out/share/info ]; then
+            shopt -s nullglob
+            for i in $out/share/info/*.info $out/share/info/*.info.gz; do
+                $out/bin/install-info $i $out/share/info/dir
+            done
+          fi
+      '';
+    };
+  };
+}
+    </screen>
+
+   <para>
+    <literal>postBuild</literal> tells Nixpkgs to run a command after building
+    the environment. In this case, <literal>install-info</literal> adds the
+    installed info pages to <literal>dir</literal> which is GNU info's default
+    root node. Note that <literal>texinfoInteractive</literal> is added to the
+    environment to give the <literal>install-info</literal> command.
+   </para>
+  </section>
+ </section>
+</chapter>

doc/contributing.xml

@@ -0,0 +1,35 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="chap-contributing">
+ <title>Contributing to this documentation</title>
+ <para>
+  The DocBook sources of the Nixpkgs manual are in the
+  <filename
+xlink:href="https://github.com/NixOS/nixpkgs/tree/master/doc">doc</filename>
+  subdirectory of the Nixpkgs repository.
+ </para>
+ <para>
+  You can quickly check your edits with <command>make</command>:
+ </para>
+<screen>
+  $ cd /path/to/nixpkgs/doc
+  $ nix-shell
+  [nix-shell]$ make
+</screen>
+ <para>
+  If you experience problems, run <command>make debug</command> to help
+  understand the docbook errors.
+ </para>
+ <para>
+  After making modifications to the manual, it's important to build it before
+  committing. You can do that as follows:
+<screen>
+  $ cd /path/to/nixpkgs/doc
+  $ nix-shell
+  [nix-shell]$ make clean
+  [nix-shell]$ nix-build .
+</screen>
+  If the build succeeds, the manual will be in
+  <filename>./result/share/doc/nixpkgs/manual.html</filename>.
+ </para>
+</chapter>

doc/contributing/coding-conventions.chapter.md

@@ -1,691 +0,0 @@
-# Coding conventions {#chap-conventions}
-
-## Syntax {#sec-syntax}
-
-- Use 2 spaces of indentation per indentation level in Nix expressions, 4 spaces in shell scripts.
-
-- Do not use tab characters, i.e. configure your editor to use soft tabs. For instance, use `(setq-default indent-tabs-mode nil)` in Emacs. Everybody has different tab settings so it’s asking for trouble.
-
-- Use `lowerCamelCase` for variable names, not `UpperCamelCase`. Note, this rule does not apply to package attribute names, which instead follow the rules in [](#sec-package-naming).
-
-- Function calls with attribute set arguments are written as
-
-  ```nix
-  foo {
-    arg = ...;
-  }
-  ```
-
-  not
-
-  ```nix
-  foo
-  {
-    arg = ...;
-  }
-  ```
-
-  Also fine is
-
-  ```nix
-  foo { arg = ...; }
-  ```
-
-  if it's a short call.
-
-- In attribute sets or lists that span multiple lines, the attribute names or list elements should be aligned:
-
-  ```nix
-  # A long list.
-  list = [
-    elem1
-    elem2
-    elem3
-  ];
-
-  # A long attribute set.
-  attrs = {
-    attr1 = short_expr;
-    attr2 =
-      if true then big_expr else big_expr;
-  };
-
-  # Combined
-  listOfAttrs = [
-    {
-      attr1 = 3;
-      attr2 = "fff";
-    }
-    {
-      attr1 = 5;
-      attr2 = "ggg";
-    }
-  ];
-  ```
-
-- Short lists or attribute sets can be written on one line:
-
-  ```nix
-  # A short list.
-  list = [ elem1 elem2 elem3 ];
-
-  # A short set.
-  attrs = { x = 1280; y = 1024; };
-  ```
-
-- Breaking in the middle of a function argument can give hard-to-read code, like
-
-  ```nix
-  someFunction { x = 1280;
-    y = 1024; } otherArg
-    yetAnotherArg
-  ```
-
-  (especially if the argument is very large, spanning multiple lines).
-
-  Better:
-
-  ```nix
-  someFunction
-    { x = 1280; y = 1024; }
-    otherArg
-    yetAnotherArg
-  ```
-
-  or
-
-  ```nix
-  let res = { x = 1280; y = 1024; };
-  in someFunction res otherArg yetAnotherArg
-  ```
-
-- The bodies of functions, asserts, and withs are not indented to prevent a lot of superfluous indentation levels, i.e.
-
-  ```nix
-  { arg1, arg2 }:
-  assert system == "i686-linux";
-  stdenv.mkDerivation { ...
-  ```
-
-  not
-
-  ```nix
-  { arg1, arg2 }:
-    assert system == "i686-linux";
-      stdenv.mkDerivation { ...
-  ```
-
-- Function formal arguments are written as:
-
-  ```nix
-  { arg1, arg2, arg3 }:
-  ```
-
-  but if they don't fit on one line they're written as:
-
-  ```nix
-  { arg1, arg2, arg3
-  , arg4, ...
-  , # Some comment...
-    argN
-  }:
-  ```
-
-- Functions should list their expected arguments as precisely as possible. That is, write
-
-  ```nix
-  { stdenv, fetchurl, perl }: ...
-  ```
-
-  instead of
-
-  ```nix
-  args: with args; ...
-  ```
-
-  or
-
-  ```nix
-  { stdenv, fetchurl, perl, ... }: ...
-  ```
-
-  For functions that are truly generic in the number of arguments (such as wrappers around `mkDerivation`) that have some required arguments, you should write them using an `@`-pattern:
-
-  ```nix
-  { stdenv, doCoverageAnalysis ? false, ... } @ args:
-
-  stdenv.mkDerivation (args // {
-    ... if doCoverageAnalysis then "bla" else "" ...
-  })
-  ```
-
-  instead of
-
-  ```nix
-  args:
-
-  args.stdenv.mkDerivation (args // {
-    ... if args ? doCoverageAnalysis && args.doCoverageAnalysis then "bla" else "" ...
-  })
-  ```
-
-- Unnecessary string conversions should be avoided. Do
-
-  ```nix
-  rev = version;
-  ```
-
-  instead of
-
-  ```nix
-  rev = "${version}";
-  ```
-
-- Building lists conditionally _should_ be done with `lib.optional(s)` instead of using `if cond then [ ... ] else null` or `if cond then [ ... ] else [ ]`.
-
-  ```nix
-  buildInputs = lib.optional stdenv.isDarwin iconv;
-  ```
-
-  instead of
-
-  ```nix
-  buildInputs = if stdenv.isDarwin then [ iconv ] else null;
-  ```
-
-  As an exception, an explicit conditional expression with null can be used when fixing a important bug without triggering a mass rebuild.
-  If this is done a follow up pull request _should_ be created to change the code to `lib.optional(s)`.
-
-- Arguments should be listed in the order they are used, with the exception of `lib`, which always goes first.
-
-## Package naming {#sec-package-naming}
-
-The key words _must_, _must not_, _required_, _shall_, _shall not_, _should_, _should not_, _recommended_, _may_, and _optional_ in this section are to be interpreted as described in [RFC 2119](https://tools.ietf.org/html/rfc2119). Only _emphasized_ words are to be interpreted in this way.
-
-In Nixpkgs, there are generally three different names associated with a package:
-
-- The `pname` attribute of the derivation. This is what most users see, in particular when using `nix-env`.
-
-- The variable name used for the instantiated package in `all-packages.nix`, and when passing it as a dependency to other functions. Typically this is called the _package attribute name_. This is what Nix expression authors see. It can also be used when installing using `nix-env -iA`.
-
-- The filename for (the directory containing) the Nix expression.
-
-Most of the time, these are the same. For instance, the package `e2fsprogs` has a `pname` attribute `"e2fsprogs"`, is bound to the variable name `e2fsprogs` in `all-packages.nix`, and the Nix expression is in `pkgs/os-specific/linux/e2fsprogs/default.nix`.
-
-There are a few naming guidelines:
-
-- The `pname` attribute _should_ be identical to the upstream package name.
-
-- The `pname` and the `version` attribute _must not_ contain uppercase letters — e.g., `"mplayer" instead of `"MPlayer"`.
-
-- The `version` attribute _must_ start with a digit e.g`"0.3.1rc2".
-
-- If a package is not a release but a commit from a repository, then the `version` attribute _must_ be the date of that (fetched) commit. The date _must_ be in `"unstable-YYYY-MM-DD"` format.
-
-- Dashes in the package `pname` _should_ be preserved in new variable names, rather than converted to underscores or camel cased — e.g., `http-parser` instead of `http_parser` or `httpParser`. The hyphenated style is preferred in all three package names.
-
-- If there are multiple versions of a package, this _should_ be reflected in the variable names in `all-packages.nix`, e.g. `json-c_0_9` and `json-c_0_11`. If there is an obvious “default” version, make an attribute like `json-c = json-c_0_9;`. See also [](#sec-versioning)
-
-## File naming and organisation {#sec-organisation}
-
-Names of files and directories should be in lowercase, with dashes between words — not in camel case. For instance, it should be `all-packages.nix`, not `allPackages.nix` or `AllPackages.nix`.
-
-### Hierarchy {#sec-hierarchy}
-
-Each package should be stored in its own directory somewhere in the `pkgs/` tree, i.e. in `pkgs/category/subcategory/.../pkgname`. Below are some rules for picking the right category for a package. Many packages fall under several categories; what matters is the _primary_ purpose of a package. For example, the `libxml2` package builds both a library and some tools; but it’s a library foremost, so it goes under `pkgs/development/libraries`.
-
-When in doubt, consider refactoring the `pkgs/` tree, e.g. creating new categories or splitting up an existing category.
-
-**If it’s used to support _software development_:**
-
-- **If it’s a _library_ used by other packages:**
-
-  - `development/libraries` (e.g. `libxml2`)
-
-- **If it’s a _compiler_:**
-
-  - `development/compilers` (e.g. `gcc`)
-
-- **If it’s an _interpreter_:**
-
-  - `development/interpreters` (e.g. `guile`)
-
-- **If it’s a (set of) development _tool(s)_:**
-
-  - **If it’s a _parser generator_ (including lexers):**
-
-    - `development/tools/parsing` (e.g. `bison`, `flex`)
-
-  - **If it’s a _build manager_:**
-
-    - `development/tools/build-managers` (e.g. `gnumake`)
-
-  - **If it’s a _language server_:**
-
-    - `development/tools/language-servers` (e.g. `ccls` or `rnix-lsp`)
-
-  - **Else:**
-
-    - `development/tools/misc` (e.g. `binutils`)
-
-- **Else:**
-
-  - `development/misc`
-
-**If it’s a (set of) _tool(s)_:**
-
-(A tool is a relatively small program, especially one intended to be used non-interactively.)
-
-- **If it’s for _networking_:**
-
-  - `tools/networking` (e.g. `wget`)
-
-- **If it’s for _text processing_:**
-
-  - `tools/text` (e.g. `diffutils`)
-
-- **If it’s a _system utility_, i.e., something related or essential to the operation of a system:**
-
-  - `tools/system` (e.g. `cron`)
-
-- **If it’s an _archiver_ (which may include a compression function):**
-
-  - `tools/archivers` (e.g. `zip`, `tar`)
-
-- **If it’s a _compression_ program:**
-
-  - `tools/compression` (e.g. `gzip`, `bzip2`)
-
-- **If it’s a _security_-related program:**
-
-  - `tools/security` (e.g. `nmap`, `gnupg`)
-
-- **Else:**
-
-  - `tools/misc`
-
-**If it’s a _shell_:**
-
-- `shells` (e.g. `bash`)
-
-**If it’s a _server_:**
-
-- **If it’s a web server:**
-
-  - `servers/http` (e.g. `apache-httpd`)
-
-- **If it’s an implementation of the X Windowing System:**
-
-  - `servers/x11` (e.g. `xorg` — this includes the client libraries and programs)
-
-- **Else:**
-
-  - `servers/misc`
-
-**If it’s a _desktop environment_:**
-
-- `desktops` (e.g. `kde`, `gnome`, `enlightenment`)
-
-**If it’s a _window manager_:**
-
-- `applications/window-managers` (e.g. `awesome`, `stumpwm`)
-
-**If it’s an _application_:**
-
-A (typically large) program with a distinct user interface, primarily used interactively.
-
-- **If it’s a _version management system_:**
-
-  - `applications/version-management` (e.g. `subversion`)
-
-- **If it’s a _terminal emulator_:**
-
-  - `applications/terminal-emulators` (e.g. `alacritty` or `rxvt` or `termite`)
-
-- **If it’s a _file manager_:**
-
-  - `applications/file-managers` (e.g. `mc` or `ranger` or `pcmanfm`)
-
-- **If it’s for _video playback / editing_:**
-
-  - `applications/video` (e.g. `vlc`)
-
-- **If it’s for _graphics viewing / editing_:**
-
-  - `applications/graphics` (e.g. `gimp`)
-
-- **If it’s for _networking_:**
-
-  - **If it’s a _mailreader_:**
-
-    - `applications/networking/mailreaders` (e.g. `thunderbird`)
-
-  - **If it’s a _newsreader_:**
-
-    - `applications/networking/newsreaders` (e.g. `pan`)
-
-  - **If it’s a _web browser_:**
-
-    - `applications/networking/browsers` (e.g. `firefox`)
-
-  - **Else:**
-
-    - `applications/networking/misc`
-
-- **Else:**
-
-  - `applications/misc`
-
-**If it’s _data_ (i.e., does not have a straight-forward executable semantics):**
-
-- **If it’s a _font_:**
-
-  - `data/fonts`
-
-- **If it’s an _icon theme_:**
-
-  - `data/icons`
-
-- **If it’s related to _SGML/XML processing_:**
-
-  - **If it’s an _XML DTD_:**
-
-    - `data/sgml+xml/schemas/xml-dtd` (e.g. `docbook`)
-
-  - **If it’s an _XSLT stylesheet_:**
-
-    (Okay, these are executable...)
-
-    - `data/sgml+xml/stylesheets/xslt` (e.g. `docbook-xsl`)
-
-- **If it’s a _theme_ for a _desktop environment_, a _window manager_ or a _display manager_:**
-
-  - `data/themes`
-
-**If it’s a _game_:**
-
-- `games`
-
-**Else:**
-
-- `misc`
-
-### Versioning {#sec-versioning}
-
-Because every version of a package in Nixpkgs creates a potential maintenance burden, old versions of a package should not be kept unless there is a good reason to do so. For instance, Nixpkgs contains several versions of GCC because other packages don’t build with the latest version of GCC. Other examples are having both the latest stable and latest pre-release version of a package, or to keep several major releases of an application that differ significantly in functionality.
-
-If there is only one version of a package, its Nix expression should be named `e2fsprogs/default.nix`. If there are multiple versions, this should be reflected in the filename, e.g. `e2fsprogs/1.41.8.nix` and `e2fsprogs/1.41.9.nix`. The version in the filename should leave out unnecessary detail. For instance, if we keep the latest Firefox 2.0.x and 3.5.x versions in Nixpkgs, they should be named `firefox/2.0.nix` and `firefox/3.5.nix`, respectively (which, at a given point, might contain versions `2.0.0.20` and `3.5.4`). If a version requires many auxiliary files, you can use a subdirectory for each version, e.g. `firefox/2.0/default.nix` and `firefox/3.5/default.nix`.
-
-All versions of a package _must_ be included in `all-packages.nix` to make sure that they evaluate correctly.
-
-## Fetching Sources {#sec-sources}
-
-There are multiple ways to fetch a package source in nixpkgs. The general guideline is that you should package reproducible sources with a high degree of availability. Right now there is only one fetcher which has mirroring support and that is `fetchurl`. Note that you should also prefer protocols which have a corresponding proxy environment variable.
-
-You can find many source fetch helpers in `pkgs/build-support/fetch*`.
-
-In the file `pkgs/top-level/all-packages.nix` you can find fetch helpers, these have names on the form `fetchFrom*`. The intention of these are to provide snapshot fetches but using the same api as some of the version controlled fetchers from `pkgs/build-support/`. As an example going from bad to good:
-
-- Bad: Uses `git://` which won't be proxied.
-
-  ```nix
-  src = fetchgit {
-    url = "git@github.com:NixOS/nix.git"
-    url = "git://github.com/NixOS/nix.git";
-    rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
-    hash = "sha256-7D4m+saJjbSFP5hOwpQq2FGR2rr+psQMTcyb1ZvtXsQ=";
-  }
-  ```
-
-- Better: This is ok, but an archive fetch will still be faster.
-
-  ```nix
-  src = fetchgit {
-    url = "https://github.com/NixOS/nix.git";
-    rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
-    hash = "sha256-7D4m+saJjbSFP5hOwpQq2FGR2rr+psQMTcyb1ZvtXsQ=";
-  }
-  ```
-
-- Best: Fetches a snapshot archive and you get the rev you want.
-
-  ```nix
-  src = fetchFromGitHub {
-    owner = "NixOS";
-    repo = "nix";
-    rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
-    hash = "ha256-7D4m+saJjbSFP5hOwpQq2FGR2rr+psQMTcyb1ZvtXsQ=;
-  }
-  ```
-
-When fetching from GitHub, commits must always be referenced by their full commit hash. This is because GitHub shares commit hashes among all forks and returns `404 Not Found` when a short commit hash is ambiguous. It already happens for some short, 6-character commit hashes in `nixpkgs`.
-It is a practical vector for a denial-of-service attack by pushing large amounts of auto generated commits into forks and was already [demonstrated against GitHub Actions Beta](https://blog.teddykatz.com/2019/11/12/github-actions-dos.html).
-
-Find the value to put as `hash` by running `nix-shell -p nix-prefetch-github --run "nix-prefetch-github --rev 1f795f9f44607cc5bec70d1300150bfefcef2aae NixOS nix"`.
-
-## Obtaining source hash {#sec-source-hashes}
-
-Preferred source hash type is sha256. There are several ways to get it.
-
-1. Prefetch URL (with `nix-prefetch-XXX URL`, where `XXX` is one of `url`, `git`, `hg`, `cvs`, `bzr`, `svn`). Hash is printed to stdout.
-
-2. Prefetch by package source (with `nix-prefetch-url '<nixpkgs>' -A PACKAGE.src`, where `PACKAGE` is package attribute name). Hash is printed to stdout.
-
-    This works well when you've upgraded existing package version and want to find out new hash, but is useless if package can't be accessed by attribute or package has multiple sources (`.srcs`, architecture-dependent sources, etc).
-
-3. Upstream provided hash: use it when upstream provides `sha256` or `sha512` (when upstream provides `md5`, don't use it, compute `sha256` instead).
-
-    A little nuance is that `nix-prefetch-*` tools produce hash encoded with `base32`, but upstream usually provides hexadecimal (`base16`) encoding. Fetchers understand both formats. Nixpkgs does not standardize on any one format.
-
-    You can convert between formats with nix-hash, for example:
-
-    ```ShellSession
-    $ nix-hash --type sha256 --to-base32 HASH
-    ```
-
-4. Extracting hash from local source tarball can be done with `sha256sum`. Use `nix-prefetch-url file:///path/to/tarball` if you want base32 hash.
-
-5. Fake hash: set the hash to one of
-
-   - `""`
-   - `lib.fakeHash`
-   - `lib.fakeSha256`
-   - `lib.fakeSha512`
-
-   in the package expression, attempt build and extract correct hash from error messages.
-
-   ::: {.warning}
-   You must use one of these four fake hashes and not some arbitrarily-chosen hash.
-
-   See [](#sec-source-hashes-security).
-   :::
-
-    This is last resort method when reconstructing source URL is non-trivial and `nix-prefetch-url -A` isn’t applicable (for example, [one of `kodi` dependencies](https://github.com/NixOS/nixpkgs/blob/d2ab091dd308b99e4912b805a5eb088dd536adb9/pkgs/applications/video/kodi/default.nix#L73)). The easiest way then would be replace hash with a fake one and rebuild. Nix build will fail and error message will contain desired hash.
-
-
-### Obtaining hashes securely {#sec-source-hashes-security}
-
-Let's say Man-in-the-Middle (MITM) sits close to your network. Then instead of fetching source you can fetch malware, and instead of source hash you get hash of malware. Here are security considerations for this scenario:
-
-- `http://` URLs are not secure to prefetch hash from;
-
-- hashes from upstream (in method 3) should be obtained via secure protocol;
-
-- `https://` URLs are secure in methods 1, 2, 3;
-
-- `https://` URLs are secure in method 5 *only if* you use one of the listed fake hashes. If you use any other hash, `fetchurl` will pass `--insecure` to `curl` and may then degrade to HTTP in case of TLS certificate expiration.
-
-## Patches {#sec-patches}
-
-Patches available online should be retrieved using `fetchpatch`.
-
-```nix
-patches = [
-  (fetchpatch {
-    name = "fix-check-for-using-shared-freetype-lib.patch";
-    url = "http://git.ghostscript.com/?p=ghostpdl.git;a=patch;h=8f5d285";
-    hash = "sha256-uRcxaCjd+WAuGrXOmGfFeu79cUILwkRdBu48mwcBE7g=";
-  })
-];
-```
-
-Otherwise, you can add a `.patch` file to the `nixpkgs` repository. In the interest of keeping our maintenance burden to a minimum, only patches that are unique to `nixpkgs` should be added in this way.
-
-If a patch is available online but does not cleanly apply, it can be modified in some fixed ways by using additional optional arguments for `fetchpatch`. Check [](#fetchpatch) for details.
-
-```nix
-patches = [ ./0001-changes.patch ];
-```
-
-If you do need to do create this sort of patch file, one way to do so is with git:
-
-1. Move to the root directory of the source code you're patching.
-
-    ```ShellSession
-    $ cd the/program/source
-    ```
-
-2. If a git repository is not already present, create one and stage all of the source files.
-
-    ```ShellSession
-    $ git init
-    $ git add .
-    ```
-
-3. Edit some files to make whatever changes need to be included in the patch.
-
-4. Use git to create a diff, and pipe the output to a patch file:
-
-    ```ShellSession
-    $ git diff -a > nixpkgs/pkgs/the/package/0001-changes.patch
-    ```
-
-## Package tests {#sec-package-tests}
-
-Tests are important to ensure quality and make reviews and automatic updates easy.
-
-The following types of tests exists:
-
-* [NixOS **module tests**](https://nixos.org/manual/nixos/stable/#sec-nixos-tests), which spawn one or more NixOS VMs. They exercise both NixOS modules and the packaged programs used within them. For example, a NixOS module test can start a web server VM running the `nginx` module, and a client VM running `curl` or a graphical `firefox`, and test that they can talk to each other and display the correct content.
-* Nix **package tests** are a lightweight alternative to NixOS module tests. They should be used to create simple integration tests for packages, but cannot test NixOS services, and some programs with graphical user interfaces may also be difficult to test with them.
-* The **`checkPhase` of a package**, which should execute the unit tests that are included in the source code of a package.
-
-Here in the nixpkgs manual we describe mostly _package tests_; for _module tests_ head over to the corresponding [section in the NixOS manual](https://nixos.org/manual/nixos/stable/#sec-nixos-tests).
-
-### Writing inline package tests {#ssec-inline-package-tests-writing}
-
-For very simple tests, they can be written inline:
-
-```nix
-{ …, yq-go }:
-
-buildGoModule rec {
-  …
-
-  passthru.tests = {
-    simple = runCommand "${pname}-test" {} ''
-      echo "test: 1" | ${yq-go}/bin/yq eval -j > $out
-      [ "$(cat $out | tr -d $'\n ')" = '{"test":1}' ]
-    '';
-  };
-}
-```
-
-### Writing larger package tests {#ssec-package-tests-writing}
-
-This is an example using the `phoronix-test-suite` package with the current best practices.
-
-Add the tests in `passthru.tests` to the package definition like this:
-
-```nix
-{ stdenv, lib, fetchurl, callPackage }:
-
-stdenv.mkDerivation {
-  …
-
-  passthru.tests = {
-    simple-execution = callPackage ./tests.nix { };
-  };
-
-  meta = { … };
-}
-```
-
-Create `tests.nix` in the package directory:
-
-```nix
-{ runCommand, phoronix-test-suite }:
-
-let
-  inherit (phoronix-test-suite) pname version;
-in
-
-runCommand "${pname}-tests" { meta.timeout = 60; }
-  ''
-    # automatic initial setup to prevent interactive questions
-    ${phoronix-test-suite}/bin/phoronix-test-suite enterprise-setup >/dev/null
-    # get version of installed program and compare with package version
-    if [[ `${phoronix-test-suite}/bin/phoronix-test-suite version` != *"${version}"*  ]]; then
-      echo "Error: program version does not match package version"
-      exit 1
-    fi
-    # run dummy command
-    ${phoronix-test-suite}/bin/phoronix-test-suite dummy_module.dummy-command >/dev/null
-    # needed for Nix to register the command as successful
-    touch $out
-  ''
-```
-
-### Running package tests {#ssec-package-tests-running}
-
-You can run these tests with:
-
-```ShellSession
-$ cd path/to/nixpkgs
-$ nix-build -A phoronix-test-suite.tests
-```
-
-### Examples of package tests {#ssec-package-tests-examples}
-
-Here are examples of package tests:
-
-- [Jasmin compile test](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/compilers/jasmin/test-assemble-hello-world/default.nix)
-- [Lobster compile test](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/compilers/lobster/test-can-run-hello-world.nix)
-- [Spacy annotation test](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/python-modules/spacy/annotation-test/default.nix)
-- [Libtorch test](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/science/math/libtorch/test/default.nix)
-- [Multiple tests for nanopb](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/nanopb/default.nix)
-
-### Linking NixOS module tests to a package {#ssec-nixos-tests-linking}
-
-Like [package tests](#ssec-package-tests-writing) as shown above, [NixOS module tests](https://nixos.org/manual/nixos/stable/#sec-nixos-tests) can also be linked to a package, so that the tests can be easily run when changing the related package.
-
-For example, assuming we're packaging `nginx`, we can link its module test via `passthru.tests`:
-
-```nix
-{ stdenv, lib, nixosTests }:
-
-stdenv.mkDerivation {
-  ...
-
-  passthru.tests = {
-    nginx = nixosTests.nginx;
-  };
-
-  ...
-}
-```
-
-### Import From Derivation {#ssec-import-from-derivation}
-
-Import From Derivation (IFD) is disallowed in Nixpkgs for performance reasons:
-[Hydra] evaluates the entire package set, and sequential builds during evaluation would increase evaluation times to become impractical.
-
-[Hydra]: https://github.com/NixOS/hydra
-
-Import From Derivation can be worked around in some cases by committing generated intermediate files to version control and reading those instead.
-
-<!-- TODO: remove the following and link to Nix manual once https://github.com/NixOS/nix/pull/7332 is merged -->
-
-See also [NixOS Wiki: Import From Derivation].
-
-[NixOS Wiki: Import From Derivation]: https://nixos.wiki/wiki/Import_From_Derivation

doc/contributing/contributing-to-documentation.chapter.md

@@ -1,118 +0,0 @@
-# Contributing to this documentation {#chap-contributing}
-
-The sources of the Nixpkgs manual are in the [doc](https://github.com/NixOS/nixpkgs/tree/master/doc) subdirectory of the Nixpkgs repository. The manual is still partially written in DocBook but it is progressively being converted to [Markdown](#sec-contributing-markup).
-
-You can quickly check your edits with `make`:
-
-```ShellSession
-$ cd /path/to/nixpkgs/doc
-$ nix-shell
-[nix-shell]$ make
-```
-
-If you experience problems, run `make debug` to help understand the docbook errors.
-
-After making modifications to the manual, it's important to build it before committing. You can do that as follows:
-
-```ShellSession
-$ cd /path/to/nixpkgs/doc
-$ nix-shell
-[nix-shell]$ make clean
-[nix-shell]$ nix-build .
-```
-
-If the build succeeds, the manual will be in `./result/share/doc/nixpkgs/manual.html`.
-
-## Syntax {#sec-contributing-markup}
-
-As per [RFC 0072](https://github.com/NixOS/rfcs/pull/72), all new documentation content should be written in [CommonMark](https://commonmark.org/) Markdown dialect.
-
-Additional syntax extensions are available, all of which can be used in NixOS option documentation. The following extensions are currently used:
-
-- []{#ssec-contributing-markup-anchors}
-  Explicitly defined **anchors** on headings, to allow linking to sections. These should be always used, to ensure the anchors can be linked even when the heading text changes, and to prevent conflicts between [automatically assigned identifiers](https://github.com/jgm/commonmark-hs/blob/master/commonmark-extensions/test/auto_identifiers.md).
-
-  It uses the widely compatible [header attributes](https://github.com/jgm/commonmark-hs/blob/master/commonmark-extensions/test/attributes.md) syntax:
-
-  ```markdown
-  ## Syntax {#sec-contributing-markup}
-  ```
-
-  ::: {.note}
-  NixOS option documentation does not support headings in general.
-  :::
-
-- []{#ssec-contributing-markup-anchors-inline}
-  **Inline anchors**, which allow linking arbitrary place in the text (e.g. individual list items, sentences…).
-
-  They are defined using a hybrid of the link syntax with the attributes syntax known from headings, called [bracketed spans](https://github.com/jgm/commonmark-hs/blob/master/commonmark-extensions/test/bracketed_spans.md):
-
-  ```markdown
-  - []{#ssec-gnome-hooks-glib} `glib` setup hook will populate `GSETTINGS_SCHEMAS_PATH` and then `wrapGAppsHook` will prepend it to `XDG_DATA_DIRS`.
-  ```
-
-- []{#ssec-contributing-markup-automatic-links}
-  If you **omit a link text** for a link pointing to a section, the text will be substituted automatically. For example, `[](#chap-contributing)` will result in [](#chap-contributing).
-
-  This syntax is taken from [MyST](https://myst-parser.readthedocs.io/en/latest/using/syntax.html#targets-and-cross-referencing).
-
-- []{#ssec-contributing-markup-inline-roles}
-  If you want to link to a man page, you can use `` {manpage}`nix.conf(5)` ``, which will turn into {manpage}`nix.conf(5)`. The references will turn into links when a mapping exists in {file}`doc/manpage-urls.json`.
-
-  A few markups for other kinds of literals are also available:
-
-  - `` {command}`rm -rfi` `` turns into {command}`rm -rfi`
-  - `` {env}`XDG_DATA_DIRS` `` turns into {env}`XDG_DATA_DIRS`
-  - `` {file}`/etc/passwd` `` turns into {file}`/etc/passwd`
-  - `` {option}`networking.useDHCP` `` turns into {option}`networking.useDHCP`
-  - `` {var}`/etc/passwd` `` turns into {var}`/etc/passwd`
-
-  These literal kinds are used mostly in NixOS option documentation.
-
-  This syntax is taken from [MyST](https://myst-parser.readthedocs.io/en/latest/syntax/syntax.html#roles-an-in-line-extension-point). Though, the feature originates from [reStructuredText](https://www.sphinx-doc.org/en/master/usage/restructuredtext/roles.html#role-manpage) with slightly different syntax.
-
-- []{#ssec-contributing-markup-admonitions}
-  **Admonitions**, set off from the text to bring attention to something.
-
-  It uses pandoc’s [fenced `div`s syntax](https://github.com/jgm/commonmark-hs/blob/master/commonmark-extensions/test/fenced_divs.md):
-
-  ```markdown
-  ::: {.warning}
-  This is a warning
-  :::
-  ```
-
-  which renders as
-
-  > ::: {.warning}
-  > This is a warning.
-  > :::
-
-  The following are supported:
-
-    - [`caution`](https://tdg.docbook.org/tdg/5.0/caution.html)
-    - [`important`](https://tdg.docbook.org/tdg/5.0/important.html)
-    - [`note`](https://tdg.docbook.org/tdg/5.0/note.html)
-    - [`tip`](https://tdg.docbook.org/tdg/5.0/tip.html)
-    - [`warning`](https://tdg.docbook.org/tdg/5.0/warning.html)
-
-- []{#ssec-contributing-markup-definition-lists}
-  [**Definition lists**](https://github.com/jgm/commonmark-hs/blob/master/commonmark-extensions/test/definition_lists.md), for defining a group of terms:
-
-  ```markdown
-  pear
-  :   green or yellow bulbous fruit
-
-  watermelon
-  :   green fruit with red flesh
-  ```
-
-  which renders as
-
-  > pear
-  > :   green or yellow bulbous fruit
-  >
-  > watermelon
-  > :   green fruit with red flesh
-
-For contributing to the legacy parts, please see [DocBook: The Definitive Guide](https://tdg.docbook.org/) or the [DocBook rocks! primer](https://web.archive.org/web/20200816233747/https://docbook.rocks/).

doc/contributing/quick-start.chapter.md

@@ -1,77 +0,0 @@
-# Quick Start to Adding a Package {#chap-quick-start}
-
-To add a package to Nixpkgs:
-
-1. Checkout the Nixpkgs source tree:
-
-   ```ShellSession
-   $ git clone https://github.com/NixOS/nixpkgs
-   $ cd nixpkgs
-   ```
-
-2. Find a good place in the Nixpkgs tree to add the Nix expression for your package. For instance, a library package typically goes into `pkgs/development/libraries/pkgname`, while a web browser goes into `pkgs/applications/networking/browsers/pkgname`. See [](#sec-organisation) for some hints on the tree organisation. Create a directory for your package, e.g.
-
-   ```ShellSession
-   $ mkdir pkgs/development/libraries/libfoo
-   ```
-
-3. In the package directory, create a Nix expression — a piece of code that describes how to build the package. In this case, it should be a _function_ that is called with the package dependencies as arguments, and returns a build of the package in the Nix store. The expression should usually be called `default.nix`.
-
-   ```ShellSession
-   $ emacs pkgs/development/libraries/libfoo/default.nix
-   $ git add pkgs/development/libraries/libfoo/default.nix
-   ```
-
-   You can have a look at the existing Nix expressions under `pkgs/` to see how it’s done. Here are some good ones:
-
-   - GNU Hello: [`pkgs/applications/misc/hello/default.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/misc/hello/default.nix). Trivial package, which specifies some `meta` attributes which is good practice.
-
-   - GNU cpio: [`pkgs/tools/archivers/cpio/default.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/archivers/cpio/default.nix). Also a simple package. The generic builder in `stdenv` does everything for you. It has no dependencies beyond `stdenv`.
-
-   - GNU Multiple Precision arithmetic library (GMP): [`pkgs/development/libraries/gmp/5.1.x.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/gmp/5.1.x.nix). Also done by the generic builder, but has a dependency on `m4`.
-
-   - Pan, a GTK-based newsreader: [`pkgs/applications/networking/newsreaders/pan/default.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/networking/newsreaders/pan/default.nix). Has an optional dependency on `gtkspell`, which is only built if `spellCheck` is `true`.
-
-   - Apache HTTPD: [`pkgs/servers/http/apache-httpd/2.4.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/servers/http/apache-httpd/2.4.nix). A bunch of optional features, variable substitutions in the configure flags, a post-install hook, and miscellaneous hackery.
-
-   - buildMozillaMach: [`pkgs/applications/networking/browser/firefox/common.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/networking/browsers/firefox/common.nix). A reusable build function for Firefox, Thunderbird and Librewolf.
-
-   - JDiskReport, a Java utility: [`pkgs/tools/misc/jdiskreport/default.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/tools/misc/jdiskreport/default.nix). Nixpkgs doesn’t have a decent `stdenv` for Java yet so this is pretty ad-hoc.
-
-   - XML::Simple, a Perl module: [`pkgs/top-level/perl-packages.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/top-level/perl-packages.nix) (search for the `XMLSimple` attribute). Most Perl modules are so simple to build that they are defined directly in `perl-packages.nix`; no need to make a separate file for them.
-
-   - Adobe Reader: [`pkgs/applications/misc/adobe-reader/default.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/misc/adobe-reader/default.nix). Shows how binary-only packages can be supported. In particular the [builder](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/misc/adobe-reader/builder.sh) uses `patchelf` to set the RUNPATH and ELF interpreter of the executables so that the right libraries are found at runtime.
-
-   Some notes:
-
-   - All [`meta`](#chap-meta) attributes are optional, but it’s still a good idea to provide at least the `description`, `homepage` and [`license`](#sec-meta-license).
-
-   - You can use `nix-prefetch-url url` to get the SHA-256 hash of source distributions. There are similar commands as `nix-prefetch-git` and `nix-prefetch-hg` available in `nix-prefetch-scripts` package.
-
-   - A list of schemes for `mirror://` URLs can be found in [`pkgs/build-support/fetchurl/mirrors.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/fetchurl/mirrors.nix).
-
-   The exact syntax and semantics of the Nix expression language, including the built-in function, are described in the Nix manual in the [chapter on writing Nix expressions](https://hydra.nixos.org/job/nix/trunk/tarball/latest/download-by-type/doc/manual/#chap-writing-nix-expressions).
-
-4. Add a call to the function defined in the previous step to [`pkgs/top-level/all-packages.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/top-level/all-packages.nix) with some descriptive name for the variable, e.g. `libfoo`.
-
-   ```ShellSession
-   $ emacs pkgs/top-level/all-packages.nix
-   ```
-
-   The attributes in that file are sorted by category (like “Development / Libraries”) that more-or-less correspond to the directory structure of Nixpkgs, and then by attribute name.
-
-5. To test whether the package builds, run the following command from the root of the nixpkgs source tree:
-
-   ```ShellSession
-   $ nix-build -A libfoo
-   ```
-
-   where `libfoo` should be the variable name defined in the previous step. You may want to add the flag `-K` to keep the temporary build directory in case something fails. If the build succeeds, a symlink `./result` to the package in the Nix store is created.
-
-6. If you want to install the package into your profile (optional), do
-
-   ```ShellSession
-   $ nix-env -f . -iA libfoo
-   ```
-
-7. Optionally commit the new package and open a pull request [to nixpkgs](https://github.com/NixOS/nixpkgs/pulls), or use [the Patches category](https://discourse.nixos.org/t/about-the-patches-category/477) on Discourse for sending a patch without a GitHub account.

doc/contributing/reviewing-contributions.chapter.md

@@ -1,319 +0,0 @@
-# Reviewing contributions {#chap-reviewing-contributions}
-
-::: {.warning}
-The following section is a draft, and the policy for reviewing is still being discussed in issues such as [#11166](https://github.com/NixOS/nixpkgs/issues/11166) and [#20836](https://github.com/NixOS/nixpkgs/issues/20836).
-:::
-
-The Nixpkgs project receives a fairly high number of contributions via GitHub pull requests. Reviewing and approving these is an important task and a way to contribute to the project.
-
-The high change rate of Nixpkgs makes any pull request that remains open for too long subject to conflicts that will require extra work from the submitter or the merger. Reviewing pull requests in a timely manner and being responsive to the comments is the key to avoid this issue. GitHub provides sort filters that can be used to see the [most recently](https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+sort%3Aupdated-desc) and the [least recently](https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+sort%3Aupdated-asc) updated pull requests. We highly encourage looking at [this list of ready to merge, unreviewed pull requests](https://github.com/NixOS/nixpkgs/pulls?q=is%3Apr+is%3Aopen+review%3Anone+status%3Asuccess+-label%3A%222.status%3A+work-in-progress%22+no%3Aproject+no%3Aassignee+no%3Amilestone).
-
-When reviewing a pull request, please always be nice and polite. Controversial changes can lead to controversial opinions, but it is important to respect every community member and their work.
-
-GitHub provides reactions as a simple and quick way to provide feedback to pull requests or any comments. The thumb-down reaction should be used with care and if possible accompanied with some explanation so the submitter has directions to improve their contribution.
-
-pull request reviews should include a list of what has been reviewed in a comment, so other reviewers and mergers can know the state of the review.
-
-All the review template samples provided in this section are generic and meant as examples. Their usage is optional and the reviewer is free to adapt them to their liking.
-
-## Package updates {#reviewing-contributions-package-updates}
-
-A package update is the most trivial and common type of pull request. These pull requests mainly consist of updating the version part of the package name and the source hash.
-
-It can happen that non-trivial updates include patches or more complex changes.
-
-Reviewing process:
-
-- Ensure that the package versioning fits the guidelines.
-- Ensure that the commit text fits the guidelines.
-- Ensure that the package maintainers are notified.
-  - [CODEOWNERS](https://help.github.com/articles/about-codeowners) will make GitHub notify users based on the submitted changes, but it can happen that it misses some of the package maintainers.
-- Ensure that the meta field information is correct.
-  - License can change with version updates, so it should be checked to match the upstream license.
-  - If the package has no maintainer, a maintainer must be set. This can be the update submitter or a community member that accepts to take maintainership of the package.
-- Ensure that the code contains no typos.
-- Building the package locally.
-  - pull requests are often targeted to the master or staging branch, and building the pull request locally when it is submitted can trigger many source builds.
-  - It is possible to rebase the changes on nixos-unstable or nixpkgs-unstable for easier review by running the following commands from a nixpkgs clone.
-
-    ```ShellSession
-    $ git fetch origin nixos-unstable
-    $ git fetch origin pull/PRNUMBER/head
-    $ git rebase --onto nixos-unstable BASEBRANCH FETCH_HEAD
-    ```
-
-    - The first command fetches the nixos-unstable branch.
-    - The second command fetches the pull request changes, `PRNUMBER` is the number at the end of the pull request title and `BASEBRANCH` the base branch of the pull request.
-    - The third command rebases the pull request changes to the nixos-unstable branch.
-  - The [nixpkgs-review](https://github.com/Mic92/nixpkgs-review) tool can be used to review a pull request content in a single command. `PRNUMBER` should be replaced by the number at the end of the pull request title. You can also provide the full github pull request url.
-
-    ```ShellSession
-    $ nix-shell -p nixpkgs-review --run "nixpkgs-review pr PRNUMBER"
-    ```
-- Running every binary.
-
-Sample template for a package update review is provided below.
-
-```markdown
-##### Reviewed points
-
-- [ ] package name fits guidelines
-- [ ] package version fits guidelines
-- [ ] package build on ARCHITECTURE
-- [ ] executables tested on ARCHITECTURE
-- [ ] all depending packages build
-
-##### Possible improvements
-
-##### Comments
-```
-
-## New packages {#reviewing-contributions-new-packages}
-
-New packages are a common type of pull requests. These pull requests consists in adding a new nix-expression for a package.
-
-Review process:
-
-- Ensure that the package versioning fits the guidelines.
-- Ensure that the commit name fits the guidelines.
-- Ensure that the meta fields contain correct information.
-  - License must match the upstream license.
-  - Platforms should be set (or the package will not get binary substitutes).
-  - Maintainers must be set. This can be the package submitter or a community member that accepts taking up maintainership of the package.
-- Report detected typos.
-- Ensure the package source:
-  - Uses mirror URLs when available.
-  - Uses the most appropriate functions (e.g. packages from GitHub should use `fetchFromGitHub`).
-- Building the package locally.
-- Running every binary.
-
-Sample template for a new package review is provided below.
-
-```markdown
-##### Reviewed points
-
-- [ ] package path fits guidelines
-- [ ] package name fits guidelines
-- [ ] package version fits guidelines
-- [ ] package build on ARCHITECTURE
-- [ ] executables tested on ARCHITECTURE
-- [ ] `meta.description` is set and fits guidelines
-- [ ] `meta.license` fits upstream license
-- [ ] `meta.platforms` is set
-- [ ] `meta.maintainers` is set
-- [ ] build time only dependencies are declared in `nativeBuildInputs`
-- [ ] source is fetched using the appropriate function
-- [ ] the list of `phases` is not overridden
-- [ ] when a phase (like `installPhase`) is overridden it starts with `runHook preInstall` and ends with `runHook postInstall`.
-- [ ] patches that are remotely available are fetched with `fetchpatch`
-
-##### Possible improvements
-
-##### Comments
-```
-
-## Module updates {#reviewing-contributions-module-updates}
-
-Module updates are submissions changing modules in some ways. These often contains changes to the options or introduce new options.
-
-Reviewing process:
-
-- Ensure that the module maintainers are notified.
-  - [CODEOWNERS](https://help.github.com/articles/about-codeowners/) will make GitHub notify users based on the submitted changes, but it can happen that it misses some of the package maintainers.
-- Ensure that the module tests, if any, are succeeding.
-- Ensure that the introduced options are correct.
-  - Type should be appropriate (string related types differs in their merging capabilities, `loaOf` and `string` types are deprecated).
-  - Description, default and example should be provided.
-- Ensure that option changes are backward compatible.
-  - `mkRenamedOptionModuleWith` provides a way to make option changes backward compatible.
-- Ensure that removed options are declared with `mkRemovedOptionModule`
-- Ensure that changes that are not backward compatible are mentioned in release notes.
-- Ensure that documentations affected by the change is updated.
-
-Sample template for a module update review is provided below.
-
-```markdown
-##### Reviewed points
-
-- [ ] changes are backward compatible
-- [ ] removed options are declared with `mkRemovedOptionModule`
-- [ ] changes that are not backward compatible are documented in release notes
-- [ ] module tests succeed on ARCHITECTURE
-- [ ] options types are appropriate
-- [ ] options description is set
-- [ ] options example is provided
-- [ ] documentation affected by the changes is updated
-
-##### Possible improvements
-
-##### Comments
-```
-
-## New modules {#reviewing-contributions-new-modules}
-
-New modules submissions introduce a new module to NixOS.
-
-Reviewing process:
-
-- Ensure that the module tests, if any, are succeeding.
-- Ensure that the introduced options are correct.
-  - Type should be appropriate (string related types differs in their merging capabilities, `loaOf` and `string` types are deprecated).
-  - Description, default and example should be provided.
-- Ensure that module `meta` field is present
-  - Maintainers should be declared in `meta.maintainers`.
-  - Module documentation should be declared with `meta.doc`.
-- Ensure that the module respect other modules functionality.
-  - For example, enabling a module should not open firewall ports by default.
-
-Sample template for a new module review is provided below.
-
-```markdown
-##### Reviewed points
-
-- [ ] module path fits the guidelines
-- [ ] module tests succeed on ARCHITECTURE
-- [ ] options have appropriate types
-- [ ] options have default
-- [ ] options have example
-- [ ] options have descriptions
-- [ ] No unneeded package is added to environment.systemPackages
-- [ ] meta.maintainers is set
-- [ ] module documentation is declared in meta.doc
-
-##### Possible improvements
-
-##### Comments
-```
-
-## Individual maintainer list {#reviewing-contributions-individual-maintainer-list}
-
-When adding users to `maintainers/maintainer-list.nix`, the following
-checks should be performed:
-
--   If the user has specified a GPG key, verify that the commit is
-    signed by their key.
-
-    First, validate that the commit adding the maintainer is signed by
-    the key the maintainer listed. Check out the pull request and
-    compare its signing key with the listed key in the commit.
-
-    If the commit is not signed or it is signed by a different user, ask
-    them to either recommit using that key or to remove their key
-    information.
-
-    Given a maintainter entry like this:
-
-    ``` nix
-    {
-      example = {
-        email = "user@example.com";
-        name = "Example User";
-        keys = [{
-          fingerprint = "0000 0000 2A70 6423 0AED  3C11 F04F 7A19 AAA6 3AFE";
-        }];
-      }
-    };
-    ```
-
-    First receive their key from a keyserver:
-
-        $ gpg --recv-keys 0xF04F7A19AAA63AFE
-        gpg: key 0xF04F7A19AAA63AFE: public key "Example <user@example.com>" imported
-        gpg: Total number processed: 1
-        gpg:               imported: 1
-
-    Then check the commit is signed by that key:
-
-        $ git log --show-signature
-        commit b87862a4f7d32319b1de428adb6cdbdd3a960153
-        gpg: Signature made Wed Mar 12 13:32:24 2003 +0000
-        gpg:                using RSA key 000000002A7064230AED3C11F04F7A19AAA63AFE
-        gpg: Good signature from "Example User <user@example.com>
-        Author: Example User <user@example.com>
-        Date:   Wed Mar 12 13:32:24 2003 +0000
-
-            maintainers: adding example
-
-    and validate that there is a `Good signature` and the printed key
-    matches the user's submitted key.
-
-    Note: GitHub's "Verified" label does not display the user's full key
-    fingerprint, and should not be used for validating the key matches.
-
--   If the user has specified a `github` account name, ensure they have
-    also specified a `githubId` and verify the two match.
-
-    Maintainer entries that include a `github` field must also include
-    their `githubId`. People can and do change their GitHub name
-    frequently, and the ID is used as the official and stable identity
-    of the maintainer.
-
-    Given a maintainer entry like this:
-
-    ``` nix
-    {
-      example = {
-        email = "user@example.com";
-        name = "Example User";
-        github = "ghost";
-        githubId = 10137;
-      }
-    };
-    ```
-
-    First, make sure that the listed GitHub handle matches the author of
-    the commit.
-
-    Then, visit the URL `https://api.github.com/users/ghost` and
-    validate that the `id` field matches the provided `githubId`.
-
-## Maintainer teams {#reviewing-contributions-maintainer-teams}
-
-Feel free to create a new maintainer team in `maintainers/team-list.nix`
-when a group is collectively responsible for a collection of packages.
-Use taste and personal judgement when deciding if a team is warranted.
-
-Teams are allowed to define their own rules about membership.
-
-For example, some teams will represent a business or other group which
-wants to carefully track its members. Other teams may be very open about
-who can join, and allow anybody to participate.
-
-When reviewing changes to a team, read the team's scope and the context
-around the member list for indications about the team's membership
-policy.
-
-In any case, request reviews from the existing team members. If the team
-lists no specific membership policy, feel free to merge changes to the
-team after giving the existing members a few days to respond.
-
-*Important:* If a team says it is a closed group, do not merge additions
-to the team without an approval by at least one existing member.
-
-## Other submissions {#reviewing-contributions-other-submissions}
-
-Other type of submissions requires different reviewing steps.
-
-If you consider having enough knowledge and experience in a topic and would like to be a long-term reviewer for related submissions, please contact the current reviewers for that topic. They will give you information about the reviewing process. The main reviewers for a topic can be hard to find as there is no list, but checking past pull requests to see who reviewed or git-blaming the code to see who committed to that topic can give some hints.
-
-Container system, boot system and library changes are some examples of the pull requests fitting this category.
-
-## Merging pull requests {#reviewing-contributions--merging-pull-requests}
-
-It is possible for community members that have enough knowledge and experience on a special topic to contribute by merging pull requests.
-
-In case the PR is stuck waiting for the original author to apply a trivial
-change (a typo, capitalisation change, etc.) and the author allowed the members
-to modify the PR, consider applying it yourself. (or commit the existing review
-suggestion) You should pay extra attention to make sure the addition doesn't go
-against the idea of the original PR and would not be opposed by the author.
-
-<!--
-The following paragraphs about how to deal with unactive contributors is just a proposition and should be modified to what the community agrees to be the right policy.
-
-Please note that contributors with commit rights unactive for more than three months will have their commit rights revoked.
--->
-
-Please see the discussion in [GitHub nixpkgs issue #50105](https://github.com/NixOS/nixpkgs/issues/50105) for information on how to proceed to be granted this level of access.
-
-In a case a contributor definitively leaves the Nix community, they should create an issue or post on [Discourse](https://discourse.nixos.org) with references of packages and modules they maintain so the maintainership can be taken over by other contributors.

doc/contributing/submitting-changes.chapter.md

@@ -1,302 +0,0 @@
-# Submitting changes {#chap-submitting-changes}
-
-## Making patches {#submitting-changes-making-patches}
-
-- Read [Manual (How to write packages for Nix)](https://nixos.org/nixpkgs/manual/).
-
-- Fork [the Nixpkgs repository](https://github.com/nixos/nixpkgs/) on GitHub.
-
-- Create a branch for your future fix.
-
-  - You can make branch from a commit of your local `nixos-version`. That will help you to avoid additional local compilations. Because you will receive packages from binary cache. For example
-
-    ```ShellSession
-    $ nixos-version --hash
-    0998212
-    $ git checkout 0998212
-    $ git checkout -b 'fix/pkg-name-update'
-    ```
-
-  - Please avoid working directly on the `master` branch.
-
-- Make commits of logical units.
-
-- If you removed pkgs or made some major NixOS changes, write about it in the release notes for the next stable release. For example `nixos/doc/manual/release-notes/rl-2003.xml`.
-
-- Check for unnecessary whitespace with `git diff --check` before committing.
-
-- Format the commit in a following way:
-
-  ```
-  (pkg-name | nixos/<module>): (from -> to | init at version | refactor | etc)
-  Additional information.
-  ```
-
-  - Examples:
-    - `nginx: init at 2.0.1`
-    - `firefox: 54.0.1 -> 55.0`
-    - `nixos/hydra: add bazBaz option`
-    - `nixos/nginx: refactor config generation`
-
-- Test your changes. If you work with
-
-  - nixpkgs:
-
-    - update pkg
-      - `nix-env -iA pkg-attribute-name -f <path to your local nixpkgs folder>`
-    - add pkg
-      - Make sure it’s in `pkgs/top-level/all-packages.nix`
-      - `nix-env -iA pkg-attribute-name -f <path to your local nixpkgs folder>`
-    - _If you don’t want to install pkg in you profile_.
-      - `nix-build -A pkg-attribute-name <path to your local nixpkgs folder>` and check results in the folder `result`. It will appear in the same directory where you did `nix-build`.
-    - If you installed your package with `nix-env`, you can run `nix-env -e pkg-name` where `pkg-name` is as reported by `nix-env -q` to uninstall it from your system.
-
-  - NixOS and its modules:
-    - You can add new module to your NixOS configuration file (usually it’s `/etc/nixos/configuration.nix`). And do `sudo nixos-rebuild test -I nixpkgs=<path to your local nixpkgs folder> --fast`.
-
-- If you have commits `pkg-name: oh, forgot to insert whitespace`: squash commits in this case. Use `git rebase -i`.
-
-- [Rebase](https://git-scm.com/book/en/v2/Git-Branching-Rebasing) your branch against current `master`.
-
-## Submitting changes {#submitting-changes-submitting-changes}
-
-- Push your changes to your fork of nixpkgs.
-- Create the pull request
-- Follow [the contribution guidelines](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#submitting-changes).
-
-## Submitting security fixes {#submitting-changes-submitting-security-fixes}
-
-Security fixes are submitted in the same way as other changes and thus the same guidelines apply.
-
-- If a new version fixing the vulnerability has been released, update the package;
-- If the security fix comes in the form of a patch and a CVE is available, then add the patch to the Nixpkgs tree, and apply it to the package.
-  The name of the patch should be the CVE identifier, so e.g. `CVE-2019-13636.patch`; If a patch is fetched the name needs to be set as well, e.g.:
-
-  ```nix
-  (fetchpatch {
-    name = "CVE-2019-11068.patch";
-    url = "https://gitlab.gnome.org/GNOME/libxslt/commit/e03553605b45c88f0b4b2980adfbbb8f6fca2fd6.patch";
-    hash = "sha256-SEKe/8HcW0UBHCfPTTOnpRlzmV2nQPPeL6HOMxBZd14=";
-  })
-  ```
-
-If a security fix applies to both master and a stable release then, similar to regular changes, they are preferably delivered via master first and cherry-picked to the release branch.
-
-Critical security fixes may by-pass the staging branches and be delivered directly to release branches such as `master` and `release-*`.
-
-## Deprecating/removing packages {#submitting-changes-deprecating-packages}
-
-There is currently no policy when to remove a package.
-
-Before removing a package, one should try to find a new maintainer or fix smaller issues first.
-
-### Steps to remove a package from Nixpkgs {#steps-to-remove-a-package-from-nixpkgs}
-
-We use jbidwatcher as an example for a discontinued project here.
-
-1. Have Nixpkgs checked out locally and up to date.
-1. Create a new branch for your change, e.g. `git checkout -b jbidwatcher`
-1. Remove the actual package including its directory, e.g. `git rm -rf pkgs/applications/misc/jbidwatcher`
-1. Remove the package from the list of all packages (`pkgs/top-level/all-packages.nix`).
-1. Add an alias for the package name in `pkgs/top-level/aliases.nix` (There is also `pkgs/applications/editors/vim/plugins/aliases.nix`. Package sets typically do not have aliases, so we can't add them there.)
-
-    For example in this case:
-
-    ```
-    jbidwatcher = throw "jbidwatcher was discontinued in march 2021"; # added 2021-03-15
-    ```
-
-    The throw message should explain in short why the package was removed for users that still have it installed.
-
-1. Test if the changes introduced any issues by running `nix-env -qaP -f . --show-trace`. It should show the list of packages without errors.
-1. Commit the changes. Explain again why the package was removed. If it was declared discontinued upstream, add a link to the source.
-
-    ```ShellSession
-    $ git add pkgs/applications/misc/jbidwatcher/default.nix pkgs/top-level/all-packages.nix pkgs/top-level/aliases.nix
-    $ git commit
-    ```
-
-    Example commit message:
-
-    ```
-    jbidwatcher: remove
-
-    project was discontinued in march 2021. the program does not work anymore because ebay changed the login.
-
-    https://web.archive.org/web/20210315205723/http://www.jbidwatcher.com/
-    ```
-
-1. Push changes to your GitHub fork with `git push`
-1. Create a pull request against Nixpkgs. Mention the package maintainer.
-
-This is how the pull request looks like in this case: [https://github.com/NixOS/nixpkgs/pull/116470](https://github.com/NixOS/nixpkgs/pull/116470)
-
-## Pull Request Template {#submitting-changes-pull-request-template}
-
-The pull request template helps determine what steps have been made for a contribution so far, and will help guide maintainers on the status of a change. The motivation section of the PR should include any extra details the title does not address and link any existing issues related to the pull request.
-
-When a PR is created, it will be pre-populated with some checkboxes detailed below:
-
-### Tested using sandboxing {#submitting-changes-tested-with-sandbox}
-
-When sandbox builds are enabled, Nix will setup an isolated environment for each build process. It is used to remove further hidden dependencies set by the build environment to improve reproducibility. This includes access to the network during the build outside of `fetch*` functions and files outside the Nix store. Depending on the operating system access to other resources are blocked as well (ex. inter process communication is isolated on Linux); see [sandbox](https://nixos.org/nix/manual/#conf-sandbox) in Nix manual for details.
-
-Sandboxing is not enabled by default in Nix due to a small performance hit on each build. In pull requests for [nixpkgs](https://github.com/NixOS/nixpkgs/) people are asked to test builds with sandboxing enabled (see `Tested using sandboxing` in the pull request template) because in<https://nixos.org/hydra/> sandboxing is also used.
-
-Depending if you use NixOS or other platforms you can use one of the following methods to enable sandboxing **before** building the package:
-
-- **Globally enable sandboxing on NixOS**: add the following to `configuration.nix`
-
-  ```nix
-  nix.useSandbox = true;
-  ```
-
-- **Globally enable sandboxing on non-NixOS platforms**: add the following to: `/etc/nix/nix.conf`
-
-  ```ini
-  sandbox = true
-  ```
-
-### Built on platform(s) {#submitting-changes-platform-diversity}
-
-Many Nix packages are designed to run on multiple platforms. As such, it’s important to let the maintainer know which platforms your changes have been tested on. It’s not always practical to test a change on all platforms, and is not required for a pull request to be merged. Only check the systems you tested the build on in this section.
-
-### Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests) {#submitting-changes-nixos-tests}
-
-Packages with automated tests are much more likely to be merged in a timely fashion because it doesn’t require as much manual testing by the maintainer to verify the functionality of the package. If there are existing tests for the package, they should be run to verify your changes do not break the tests. Tests can only be run on Linux. For more details on writing and running tests, see the [section in the NixOS manual](https://nixos.org/nixos/manual/index.html#sec-nixos-tests).
-
-### Tested compilation of all pkgs that depend on this change using `nixpkgs-review` {#submitting-changes-tested-compilation}
-
-If you are updating a package’s version, you can use `nixpkgs-review` to make sure all packages that depend on the updated package still compile correctly. The `nixpkgs-review` utility can look for and build all dependencies either based on uncommitted changes with the `wip` option or specifying a GitHub pull request number.
-
-Review changes from pull request number 12345:
-
-```ShellSession
-nix-shell -p nixpkgs-review --run "nixpkgs-review pr 12345"
-```
-
-Alternatively, with flakes (and analogously for the other commands below):
-
-```ShellSession
-nix run nixpkgs#nixpkgs-review -- pr 12345
-```
-
-Review uncommitted changes:
-
-```ShellSession
-nix-shell -p nixpkgs-review --run "nixpkgs-review wip"
-```
-
-Review changes from last commit:
-
-```ShellSession
-nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD"
-```
-
-### Tested execution of all binary files (usually in `./result/bin/`) {#submitting-changes-tested-execution}
-
-It’s important to test any executables generated by a build when you change or create a package in nixpkgs. This can be done by looking in `./result/bin` and running any files in there, or at a minimum, the main executable for the package. For example, if you make a change to texlive, you probably would only check the binaries associated with the change you made rather than testing all of them.
-
-### Meets Nixpkgs contribution standards {#submitting-changes-contribution-standards}
-
-The last checkbox is fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md). The contributing document has detailed information on standards the Nix community has for commit messages, reviews, licensing of contributions you make to the project, etc... Everyone should read and understand the standards the community has for contributing before submitting a pull request.
-
-## Hotfixing pull requests {#submitting-changes-hotfixing-pull-requests}
-
-- Make the appropriate changes in you branch.
-- Don’t create additional commits, do
-  - `git rebase -i`
-  - `git push --force` to your branch.
-
-## Commit policy {#submitting-changes-commit-policy}
-
-- Commits must be sufficiently tested before being merged, both for the master and staging branches.
-- Hydra builds for master and staging should not be used as testing platform, it’s a build farm for changes that have been already tested.
-- When changing the bootloader installation process, extra care must be taken. Grub installations cannot be rolled back, hence changes may break people’s installations forever. For any non-trivial change to the bootloader please file a PR asking for review, especially from \@edolstra.
-
-```{.graphviz caption="Staging workflow"}
-digraph {
-    "small changes" [shape=none]
-    "mass-rebuilds and other large changes" [shape=none]
-    "critical security fixes" [shape=none]
-    "broken staging-next fixes" [shape=none]
-
-    "small changes" -> master
-    "mass-rebuilds and other large changes" -> staging
-    "critical security fixes" -> master
-    "broken staging-next fixes" -> "staging-next"
-
-    "staging-next" -> master [color="#E85EB0"] [label="stabilization ends"] [fontcolor="#E85EB0"]
-    "staging" -> "staging-next" [color="#E85EB0"] [label="stabilization starts"] [fontcolor="#E85EB0"]
-
-    master -> "staging-next" -> staging [color="#5F5EE8"] [label="every six hours (GitHub Action)"] [fontcolor="#5F5EE8"]
-}
-```
-
-[This GitHub Action](https://github.com/NixOS/nixpkgs/blob/master/.github/workflows/periodic-merge-6h.yml) brings changes from `master` to `staging-next` and from `staging-next` to `staging` every 6 hours; these are the blue arrows in the diagram above.  The purple arrows in the diagram above are done manually and much less frequently.  You can get an idea of how often these merges occur by looking at the git history.
-
-
-### Master branch {#submitting-changes-master-branch}
-
-The `master` branch is the main development branch. It should only see non-breaking commits that do not cause mass rebuilds.
-
-### Staging branch {#submitting-changes-staging-branch}
-
-The `staging` branch is a development branch where mass-rebuilds go. Mass rebuilds are commits that cause rebuilds for many packages, like more than 500 (or perhaps, if it's 'light' packages, 1000). It should only see non-breaking mass-rebuild commits. That means it is not to be used for testing, and changes must have been well tested already. If the branch is already in a broken state, please refrain from adding extra new breakages.
-
-During the process of a releasing a new NixOS version, this branch or the release-critical packages can be restricted to non-breaking changes.
-
-### Staging-next branch {#submitting-changes-staging-next-branch}
-
-The `staging-next` branch is for stabilizing mass-rebuilds submitted to the `staging` branch prior to merging them into `master`. Mass-rebuilds must go via the `staging` branch. It must only see non-breaking commits that are fixing issues blocking it from being merged into the `master` branch.
-
-If the branch is already in a broken state, please refrain from adding extra new breakages. Stabilize it for a few days and then merge into master.
-
-During the process of a releasing a new NixOS version, this branch or the release-critical packages can be restricted to non-breaking changes.
-
-### Stable release branches {#submitting-changes-stable-release-branches}
-
-The same staging workflow applies to stable release branches, but the main branch is called `release-*` instead of `master`.
-
-Example branch names: `release-21.11`, `staging-21.11`, `staging-next-21.11`.
-
-Most changes added to the stable release branches are cherry-picked (“backported”) from the `master` and staging branches.
-
-#### Automatically backporting a Pull Request {#submitting-changes-stable-release-branches-automatic-backports}
-
-Assign label `backport <branch>` (e.g. `backport release-21.11`) to the PR and a backport PR is automatically created after the PR is merged.
-
-#### Manually backporting changes {#submitting-changes-stable-release-branches-manual-backports}
-
-Cherry-pick changes via `git cherry-pick -x <original commit>` so that the original commit id is included in the commit message.
-
-Add a reason for the backport when it is not obvious from the original commit message. You can do this by cherry picking with `git cherry-pick -xe <original commit>`, which allows editing the commit message. This is not needed for minor version updates that include security and bug fixes but don't add new features or when the commit fixes an otherwise broken package.
-
-Here is an example of a cherry-picked commit message with good reason description:
-
-```
-zfs: Keep trying root import until it works
-
-Works around #11003.
-
-(cherry picked from commit 98b213a11041af39b39473906b595290e2a4e2f9)
-
-Reason: several people cannot boot with ZFS on NVMe
-```
-
-Other examples of reasons are:
-
-- Previously the build would fail due to, e.g., `getaddrinfo` not being defined
-- The previous download links were all broken
-- Crash when starting on some X11 systems
-
-#### Acceptable backport criteria
-
-The stable branch does have some changes which cannot be backported. Most notable are breaking changes. The desire is to have stable users be uninterrupted when updating packages.
-
-However, many changes are able to be backported, including:
-- New Packages / Modules
-- Security / Patch updates
-- Version updates which include new functionality (but no breaking changes)
-- Services which require a client to be up-to-date regardless. (E.g. `spotify`, `steam`, or `discord`)
-- Security critical applications (E.g. `firefox`)

doc/contributing/vulnerability-roundup.chapter.md

@@ -1,45 +0,0 @@
-# Vulnerability Roundup {#chap-vulnerability-roundup}
-
-## Issues {#vulnerability-roundup-issues}
-
-Vulnerable packages in Nixpkgs are managed using issues.
-Currently opened ones can be found using the following:
-
-[github.com/NixOS/nixpkgs/issues?q=is:issue+is:open+"Vulnerability+roundup"](https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+%22Vulnerability+roundup%22)
-
-Each issue correspond to a vulnerable version of a package; As a consequence:
-
-- One issue can contain several CVEs;
-- One CVE can be shared across several issues;
-- A single package can be concerned by several issues.
-
-
-A "Vulnerability roundup" issue usually respects the following format:
-
-```txt
-<link to relevant package search on search.nix.gsc.io>, <link to relevant files in Nixpkgs on GitHub>
-
-<list of related CVEs, their CVSS score, and the impacted NixOS version>
-
-<list of the scanned Nixpkgs versions>
-
-<list of relevant contributors>
-```
-
-Note that there can be an extra comment containing links to previously reported (and still open) issues for the same package.
-
-
-## Triaging and Fixing {#vulnerability-roundup-triaging-and-fixing}
-
-**Note**: An issue can be a "false positive" (i.e. automatically opened, but without the package it refers to being actually vulnerable).
-If you find such a "false positive", comment on the issue an explanation of why it falls into this category, linking as much information as the necessary to help maintainers double check.
-
-If you are investigating a "true positive":
-
-- Find the earliest patched version or a code patch in the CVE details;
-- Is the issue already patched (version up-to-date or patch applied manually) in Nixpkgs's `master` branch?
-  - **No**:
-    - [Submit a security fix](#submitting-changes-submitting-security-fixes);
-    - Once the fix is merged into `master`, [submit the change to the vulnerable release branch(es)](https://nixos.org/manual/nixpkgs/stable/#submitting-changes-stable-release-branches);
-  - **Yes**: [Backport the change to the vulnerable release branch(es)](https://nixos.org/manual/nixpkgs/stable/#submitting-changes-stable-release-branches).
-- When the patch has made it into all the relevant branches (`master`, and the vulnerable releases), close the relevant issue(s).

doc/cross-compilation.xml

@@ -0,0 +1,478 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="chap-cross">
+ <title>Cross-compilation</title>
+ <section xml:id="sec-cross-intro">
+  <title>Introduction</title>
+
+  <para>
+   "Cross-compilation" means compiling a program on one machine for another
+   type of machine. For example, a typical use of cross compilation is to
+   compile programs for embedded devices. These devices often don't have the
+   computing power and memory to compile their own programs. One might think
+   that cross-compilation is a fairly niche concern, but there are advantages
+   to being rigorous about distinguishing build-time vs run-time environments
+   even when one is developing and deploying on the same machine. Nixpkgs is
+   increasingly adopting the opinion that packages should be written with
+   cross-compilation in mind, and nixpkgs should evaluate in a similar way (by
+   minimizing cross-compilation-specific special cases) whether or not one is
+   cross-compiling.
+  </para>
+
+  <para>
+   This chapter will be organized in three parts. First, it will describe the
+   basics of how to package software in a way that supports cross-compilation.
+   Second, it will describe how to use Nixpkgs when cross-compiling. Third, it
+   will describe the internal infrastructure supporting cross-compilation.
+  </para>
+ </section>
+<!--============================================================-->
+ <section xml:id="sec-cross-packaging">
+  <title>Packaging in a cross-friendly manner</title>
+
+  <section>
+   <title>Platform parameters</title>
+
+   <para>
+    Nixpkgs follows the
+    <link xlink:href="https://gcc.gnu.org/onlinedocs/gccint/Configure-Terms.html">common
+    historical convention of GNU autoconf</link> of distinguishing between 3
+    types of platform: <wordasword>build</wordasword>,
+    <wordasword>host</wordasword>, and <wordasword>target</wordasword>. In
+    summary, <wordasword>build</wordasword> is the platform on which a package
+    is being built, <wordasword>host</wordasword> is the platform on which it
+    is to run. The third attribute, <wordasword>target</wordasword>, is
+    relevant only for certain specific compilers and build tools.
+   </para>
+
+   <para>
+    In Nixpkgs, these three platforms are defined as attribute sets under the
+    names <literal>buildPlatform</literal>, <literal>hostPlatform</literal>,
+    and <literal>targetPlatform</literal>. All three are always defined as
+    attributes in the standard environment, and at the top level. That means
+    one can get at them just like a dependency in a function that is imported
+    with <literal>callPackage</literal>:
+<programlisting>{ stdenv, buildPlatform, hostPlatform, fooDep, barDep, .. }: ...buildPlatform...</programlisting>
+    , or just off <varname>stdenv</varname>:
+<programlisting>{ stdenv, fooDep, barDep, .. }: ...stdenv.buildPlatform...</programlisting>
+    .
+   </para>
+
+   <variablelist>
+    <varlistentry>
+     <term>
+      <varname>buildPlatform</varname>
+     </term>
+     <listitem>
+      <para>
+       The "build platform" is the platform on which a package is built. Once
+       someone has a built package, or pre-built binary package, the build
+       platform should not matter and be safe to ignore.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>hostPlatform</varname>
+     </term>
+     <listitem>
+      <para>
+       The "host platform" is the platform on which a package will be run. This
+       is the simplest platform to understand, but also the one with the worst
+       name.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>targetPlatform</varname>
+     </term>
+     <listitem>
+      <para>
+       The "target platform" attribute is, unlike the other two attributes, not
+       actually fundamental to the process of building software. Instead, it is
+       only relevant for compatibility with building certain specific compilers
+       and build tools. It can be safely ignored for all other packages.
+      </para>
+      <para>
+       The build process of certain compilers is written in such a way that the
+       compiler resulting from a single build can itself only produce binaries
+       for a single platform. The task specifying this single "target platform"
+       is thus pushed to build time of the compiler. The root cause of this
+       mistake is often that the compiler (which will be run on the host) and
+       the the standard library/runtime (which will be run on the target) are
+       built by a single build process.
+      </para>
+      <para>
+       There is no fundamental need to think about a single target ahead of
+       time like this. If the tool supports modular or pluggable backends, both
+       the need to specify the target at build time and the constraint of
+       having only a single target disappear. An example of such a tool is
+       LLVM.
+      </para>
+      <para>
+       Although the existance of a "target platfom" is arguably a historical
+       mistake, it is a common one: examples of tools that suffer from it are
+       GCC, Binutils, GHC and Autoconf. Nixpkgs tries to avoid sharing in the
+       mistake where possible. Still, because the concept of a target platform
+       is so ingrained, it is best to support it as is.
+      </para>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+
+   <para>
+    The exact schema these fields follow is a bit ill-defined due to a long and
+    convoluted evolution, but this is slowly being cleaned up. You can see
+    examples of ones used in practice in
+    <literal>lib.systems.examples</literal>; note how they are not all very
+    consistent. For now, here are few fields can count on them containing:
+   </para>
+
+   <variablelist>
+    <varlistentry>
+     <term>
+      <varname>system</varname>
+     </term>
+     <listitem>
+      <para>
+       This is a two-component shorthand for the platform. Examples of this
+       would be "x86_64-darwin" and "i686-linux"; see
+       <literal>lib.systems.doubles</literal> for more. This format isn't very
+       standard, but has built-in support in Nix, such as the
+       <varname>builtins.currentSystem</varname> impure string.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>config</varname>
+     </term>
+     <listitem>
+      <para>
+       This is a 3- or 4- component shorthand for the platform. Examples of
+       this would be "x86_64-unknown-linux-gnu" and "aarch64-apple-darwin14".
+       This is a standard format called the "LLVM target triple", as they are
+       pioneered by LLVM and traditionally just used for the
+       <varname>targetPlatform</varname>. This format is strictly more
+       informative than the "Nix host double", as the previous format could
+       analogously be termed. This needs a better name than
+       <varname>config</varname>!
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>parsed</varname>
+     </term>
+     <listitem>
+      <para>
+       This is a nix representation of a parsed LLVM target triple with
+       white-listed components. This can be specified directly, or actually
+       parsed from the <varname>config</varname>. [Technically, only one need
+       be specified and the others can be inferred, though the precision of
+       inference may not be very good.] See
+       <literal>lib.systems.parse</literal> for the exact representation.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>libc</varname>
+     </term>
+     <listitem>
+      <para>
+       This is a string identifying the standard C library used. Valid
+       identifiers include "glibc" for GNU libc, "libSystem" for Darwin's
+       Libsystem, and "uclibc" for µClibc. It should probably be refactored to
+       use the module system, like <varname>parse</varname>.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>is*</varname>
+     </term>
+     <listitem>
+      <para>
+       These predicates are defined in <literal>lib.systems.inspect</literal>,
+       and slapped on every platform. They are superior to the ones in
+       <varname>stdenv</varname> as they force the user to be explicit about
+       which platform they are inspecting. Please use these instead of those.
+      </para>
+     </listitem>
+    </varlistentry>
+    <varlistentry>
+     <term>
+      <varname>platform</varname>
+     </term>
+     <listitem>
+      <para>
+       This is, quite frankly, a dumping ground of ad-hoc settings (it's an
+       attribute set). See <literal>lib.systems.platforms</literal> for
+       examples—there's hopefully one in there that will work verbatim for
+       each platform that is working. Please help us triage these flags and
+       give them better homes!
+      </para>
+     </listitem>
+    </varlistentry>
+   </variablelist>
+  </section>
+
+  <section>
+   <title>Specifying Dependencies</title>
+
+   <para>
+    In this section we explore the relationship between both runtime and
+    buildtime dependencies and the 3 Autoconf platforms.
+   </para>
+
+   <para>
+    A runtime dependency between 2 packages implies that between them both the
+    host and target platforms match. This is directly implied by the meaning of
+    "host platform" and "runtime dependency": The package dependency exists
+    while both packages are running on a single host platform.
+   </para>
+
+   <para>
+    A build time dependency, however, implies a shift in platforms between the
+    depending package and the depended-on package. The meaning of a build time
+    dependency is that to build the depending package we need to be able to run
+    the depended-on's package. The depending package's build platform is
+    therefore equal to the depended-on package's host platform. Analogously,
+    the depending package's host platform is equal to the depended-on package's
+    target platform.
+   </para>
+
+   <para>
+    In this manner, given the 3 platforms for one package, we can determine the
+    three platforms for all its transitive dependencies. This is the most
+    important guiding principle behind cross-compilation with Nixpkgs, and will
+    be called the <wordasword>sliding window principle</wordasword>.
+   </para>
+
+   <para>
+    Some examples will probably make this clearer. If a package is being built
+    with a <literal>(build, host, target)</literal> platform triple of
+    <literal>(foo, bar, bar)</literal>, then its build-time dependencies would
+    have a triple of <literal>(foo, foo, bar)</literal>, and <emphasis>those
+    packages'</emphasis> build-time dependencies would have triple of
+    <literal>(foo, foo, foo)</literal>. In other words, it should take two
+    "rounds" of following build-time dependency edges before one reaches a
+    fixed point where, by the sliding window principle, the platform triple no
+    longer changes. Indeed, this happens with cross compilation, where only
+    rounds of native dependencies starting with the second necessarily coincide
+    with native packages.
+   </para>
+
+   <note>
+    <para>
+     The depending package's target platform is unconstrained by the sliding
+     window principle, which makes sense in that one can in principle build
+     cross compilers targeting arbitrary platforms.
+    </para>
+   </note>
+
+   <para>
+    How does this work in practice? Nixpkgs is now structured so that
+    build-time dependencies are taken from <varname>buildPackages</varname>,
+    whereas run-time dependencies are taken from the top level attribute set.
+    For example, <varname>buildPackages.gcc</varname> should be used at build
+    time, while <varname>gcc</varname> should be used at run time. Now, for
+    most of Nixpkgs's history, there was no <varname>buildPackages</varname>,
+    and most packages have not been refactored to use it explicitly. Instead,
+    one can use the six (<emphasis>gasp</emphasis>) attributes used for
+    specifying dependencies as documented in
+    <xref linkend="ssec-stdenv-dependencies"/>. We "splice" together the
+    run-time and build-time package sets with <varname>callPackage</varname>,
+    and then <varname>mkDerivation</varname> for each of four attributes pulls
+    the right derivation out. This splicing can be skipped when not cross
+    compiling as the package sets are the same, but is a bit slow for cross
+    compiling. Because of this, a best-of-both-worlds solution is in the works
+    with no splicing or explicit access of <varname>buildPackages</varname>
+    needed. For now, feel free to use either method.
+   </para>
+
+   <note>
+    <para>
+     There is also a "backlink" <varname>targetPackages</varname>, yielding a
+     package set whose <varname>buildPackages</varname> is the current package
+     set. This is a hack, though, to accommodate compilers with lousy build
+     systems. Please do not use this unless you are absolutely sure you are
+     packaging such a compiler and there is no other way.
+    </para>
+   </note>
+  </section>
+
+  <section>
+   <title>Cross packagaing cookbook</title>
+
+   <para>
+    Some frequently problems when packaging for cross compilation are good to
+    just spell and answer. Ideally the information above is exhaustive, so this
+    section cannot provide any new information, but its ludicrous and cruel to
+    expect everyone to spend effort working through the interaction of many
+    features just to figure out the same answer to the same common problem.
+    Feel free to add to this list!
+   </para>
+
+   <qandaset>
+    <qandaentry>
+     <question>
+      <para>
+       What if my package's build system needs to build a C program to be run
+       under the build environment?
+      </para>
+     </question>
+     <answer>
+      <para>
+<programlisting>depsBuildBuild = [ buildPackages.stdenv.cc ];</programlisting>
+       Add it to your <function>mkDerivation</function> invocation.
+      </para>
+     </answer>
+    </qandaentry>
+    <qandaentry>
+     <question>
+      <para>
+       My package fails to find <command>ar</command>.
+      </para>
+     </question>
+     <answer>
+      <para>
+       Many packages assume that an unprefixed <command>ar</command> is
+       available, but Nix doesn't provide one. It only provides a prefixed one,
+       just as it only does for all the other binutils programs. It may be
+       necessary to patch the package to fix the build system to use a prefixed
+       `ar`.
+      </para>
+     </answer>
+    </qandaentry>
+    <qandaentry>
+     <question>
+      <para>
+       My package's testsuite needs to run host platform code.
+      </para>
+     </question>
+     <answer>
+      <para>
+<programlisting>doCheck = stdenv.hostPlatform != stdenv.buildPlatfrom;</programlisting>
+       Add it to your <function>mkDerivation</function> invocation.
+      </para>
+     </answer>
+    </qandaentry>
+   </qandaset>
+  </section>
+ </section>
+<!--============================================================-->
+ <section xml:id="sec-cross-usage">
+  <title>Cross-building packages</title>
+
+  <note>
+   <para>
+    More information needs to moved from the old wiki, especially
+    <link xlink:href="https://nixos.org/wiki/CrossCompiling" />, for this
+    section.
+   </para>
+  </note>
+
+  <para>
+   Nixpkgs can be instantiated with <varname>localSystem</varname> alone, in
+   which case there is no cross compiling and everything is built by and for
+   that system, or also with <varname>crossSystem</varname>, in which case
+   packages run on the latter, but all building happens on the former. Both
+   parameters take the same schema as the 3 (build, host, and target) platforms
+   defined in the previous section. As mentioned above,
+   <literal>lib.systems.examples</literal> has some platforms which are used as
+   arguments for these parameters in practice. You can use them
+   programmatically, or on the command line:
+<programlisting>
+nix-build &lt;nixpkgs&gt; --arg crossSystem '(import &lt;nixpkgs/lib&gt;).systems.examples.fooBarBaz' -A whatever</programlisting>
+  </para>
+
+  <note>
+   <para>
+    Eventually we would like to make these platform examples an unnecessary
+    convenience so that
+<programlisting>
+nix-build &lt;nixpkgs&gt; --arg crossSystem.config '&lt;arch&gt;-&lt;os&gt;-&lt;vendor&gt;-&lt;abi&gt;' -A whatever</programlisting>
+    works in the vast majority of cases. The problem today is dependencies on
+    other sorts of configuration which aren't given proper defaults. We rely on
+    the examples to crudely to set those configuration parameters in some
+    vaguely sane manner on the users behalf. Issue
+    <link xlink:href="https://github.com/NixOS/nixpkgs/issues/34274">#34274</link>
+    tracks this inconvenience along with its root cause in crufty configuration
+    options.
+   </para>
+  </note>
+
+  <para>
+   While one is free to pass both parameters in full, there's a lot of logic to
+   fill in missing fields. As discussed in the previous section, only one of
+   <varname>system</varname>, <varname>config</varname>, and
+   <varname>parsed</varname> is needed to infer the other two. Additionally,
+   <varname>libc</varname> will be inferred from <varname>parse</varname>.
+   Finally, <literal>localSystem.system</literal> is also
+   <emphasis>impurely</emphasis> inferred based on the platform evaluation
+   occurs. This means it is often not necessary to pass
+   <varname>localSystem</varname> at all, as in the command-line example in the
+   previous paragraph.
+  </para>
+
+  <note>
+   <para>
+    Many sources (manual, wiki, etc) probably mention passing
+    <varname>system</varname>, <varname>platform</varname>, along with the
+    optional <varname>crossSystem</varname> to nixpkgs: <literal>import
+    &lt;nixpkgs&gt; { system = ..; platform = ..; crossSystem = ..;
+    }</literal>. Passing those two instead of <varname>localSystem</varname> is
+    still supported for compatibility, but is discouraged. Indeed, much of the
+    inference we do for these parameters is motivated by compatibility as much
+    as convenience.
+   </para>
+  </note>
+
+  <para>
+   One would think that <varname>localSystem</varname> and
+   <varname>crossSystem</varname> overlap horribly with the three
+   <varname>*Platforms</varname> (<varname>buildPlatform</varname>,
+   <varname>hostPlatform,</varname> and <varname>targetPlatform</varname>; see
+   <varname>stage.nix</varname> or the manual). Actually, those identifiers are
+   purposefully not used here to draw a subtle but important distinction: While
+   the granularity of having 3 platforms is necessary to properly *build*
+   packages, it is overkill for specifying the user's *intent* when making a
+   build plan or package set. A simple "build vs deploy" dichotomy is adequate:
+   the sliding window principle described in the previous section shows how to
+   interpolate between the these two "end points" to get the 3 platform triple
+   for each bootstrapping stage. That means for any package a given package
+   set, even those not bound on the top level but only reachable via
+   dependencies or <varname>buildPackages</varname>, the three platforms will
+   be defined as one of <varname>localSystem</varname> or
+   <varname>crossSystem</varname>, with the former replacing the latter as one
+   traverses build-time dependencies. A last simple difference then is
+   <varname>crossSystem</varname> should be null when one doesn't want to
+   cross-compile, while the <varname>*Platform</varname>s are always non-null.
+   <varname>localSystem</varname> is always non-null.
+  </para>
+ </section>
+<!--============================================================-->
+ <section xml:id="sec-cross-infra">
+  <title>Cross-compilation infrastructure</title>
+
+  <para>
+   To be written.
+  </para>
+
+  <note>
+   <para>
+    If one explores nixpkgs, they will see derivations with names like
+    <literal>gccCross</literal>. Such <literal>*Cross</literal> derivations is
+    a holdover from before we properly distinguished between the host and
+    target platforms —the derivation with "Cross" in the name covered the
+    <literal>build = host != target</literal> case, while the other covered the
+    <literal>host = target</literal>, with build platform the same or not based
+    on whether one was using its <literal>.nativeDrv</literal> or
+    <literal>.crossDrv</literal>. This ugliness will disappear soon.
+   </para>
+  </note>
+ </section>
+</chapter>

doc/default.nix

@@ -1,23 +1,37 @@
-{ pkgs ? (import ./.. { }), nixpkgs ? { }}:
 let
-  doc-support = import ./doc-support { inherit pkgs nixpkgs; };
-in pkgs.stdenv.mkDerivation {
+  pkgs = import ./.. { };
+  lib = pkgs.lib;
+  sources = lib.sourceFilesBySuffices ./. [".xml"];
+  sources-langs = ./languages-frameworks;
+in
+pkgs.stdenv.mkDerivation {
   name = "nixpkgs-manual";
 
-  nativeBuildInputs = with pkgs; [
-    pandoc
-    graphviz
-    libxml2
-    libxslt
-    zip
-    jing
-    xmlformat
+  buildInputs = with pkgs; [ pandoc libxml2 libxslt zip jing  xmlformat ];
+
+  src = ./.;
+
+  # Hacking on these variables? Make sure to close and open
+  # nix-shell between each test, maybe even:
+  # $ nix-shell --run "make clean all"
+  # otherwise they won't reapply :)
+  HIGHLIGHTJS = pkgs.documentation-highlighter;
+  XSL = "${pkgs.docbook5_xsl}/xml/xsl";
+  RNG = "${pkgs.docbook5}/xml/rng/docbook/docbook.rng";
+  XMLFORMAT_CONFIG = ../nixos/doc/xmlformat.conf;
+  xsltFlags = lib.concatStringsSep " " [
+    "--param section.autolabel 1"
+    "--param section.label.includes.component.label 1"
+    "--stringparam html.stylesheet 'style.css overrides.css highlightjs/mono-blue.css'"
+    "--stringparam html.script './highlightjs/highlight.pack.js ./highlightjs/loader.js'"
+    "--param xref.with.number.and.title 1"
+    "--param toc.section.depth 3"
+    "--stringparam admon.style ''"
+    "--stringparam callout.graphics.extension .svg"
   ];
 
-  src = pkgs.nix-gitignore.gitignoreSource [] ./.;
-
   postPatch = ''
-    ln -s ${doc-support} ./doc-support/result
+    echo ${lib.nixpkgsVersion} > .version
   '';
 
   installPhase = ''
@@ -30,10 +44,5 @@ in pkgs.stdenv.mkDerivation {
 
     mkdir -p $out/nix-support/
     echo "doc manual $dest manual.html" >> $out/nix-support/hydra-build-products
-    echo "doc manual $dest nixpkgs-manual.epub" >> $out/nix-support/hydra-build-products
   '';
-
-  # Environment variables
-  PANDOC_LUA_FILTERS_DIR = "${pkgs.pandoc-lua-filters}/share/pandoc/filters";
-  PANDOC_LINK_MANPAGES_FILTER = import build-aux/pandoc-filters/link-manpages.nix { inherit pkgs; };
 }

doc/doc-support/default.nix

@@ -1,84 +0,0 @@
-{ pkgs ? (import ../.. {}), nixpkgs ? { }}:
-let
-  inherit (pkgs) lib;
-  inherit (lib) hasPrefix removePrefix;
-
-  libsets = [
-    { name = "asserts"; description = "assertion functions"; }
-    { name = "attrsets"; description = "attribute set functions"; }
-    { name = "strings"; description = "string manipulation functions"; }
-    { name = "versions"; description = "version string functions"; }
-    { name = "trivial"; description = "miscellaneous functions"; }
-    { name = "lists"; description = "list manipulation functions"; }
-    { name = "debug"; description = "debugging functions"; }
-    { name = "options"; description = "NixOS / nixpkgs option handling"; }
-    { name = "path"; description = "path functions"; }
-    { name = "filesystem"; description = "filesystem functions"; }
-    { name = "sources"; description = "source filtering functions"; }
-    { name = "cli"; description = "command-line serialization functions"; }
-  ];
-
-  locationsXml = import ./lib-function-locations.nix { inherit pkgs nixpkgs libsets; };
-  functionDocs = import ./lib-function-docs.nix { inherit locationsXml pkgs libsets; };
-  version = pkgs.lib.version;
-
-  epub-xsl = pkgs.writeText "epub.xsl" ''
-    <?xml version='1.0'?>
-    <xsl:stylesheet
-      xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-      version="1.0">
-      <xsl:import href="${pkgs.docbook_xsl_ns}/xml/xsl/docbook/epub/docbook.xsl" />
-      <xsl:import href="${./parameters.xml}"/>
-    </xsl:stylesheet>
-  '';
-
-  xhtml-xsl = pkgs.writeText "xhtml.xsl" ''
-    <?xml version='1.0'?>
-    <xsl:stylesheet
-      xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-      version="1.0">
-      <xsl:import href="${pkgs.docbook_xsl_ns}/xml/xsl/docbook/xhtml/docbook.xsl" />
-      <xsl:import href="${./parameters.xml}"/>
-    </xsl:stylesheet>
-  '';
-
-  # NB: This file describes the Nixpkgs manual, which happens to use module
-  #     docs infra originally developed for NixOS.
-  optionsDoc = pkgs.nixosOptionsDoc {
-    inherit (pkgs.lib.evalModules { modules = [ ../../pkgs/top-level/config.nix ]; }) options;
-    documentType = "none";
-    transformOptions = opt:
-      opt // {
-        declarations =
-          map
-            (decl:
-              if hasPrefix (toString ../..) (toString decl)
-              then
-                let subpath = removePrefix "/" (removePrefix (toString ../..) (toString decl));
-                in { url = "https://github.com/NixOS/nixpkgs/blob/master/${subpath}"; name = subpath; }
-              else decl)
-            opt.declarations;
-        };
-  };
-
-in pkgs.runCommand "doc-support" {}
-''
-  mkdir result
-  (
-    cd result
-    ln -s ${locationsXml} ./function-locations.xml
-    ln -s ${functionDocs} ./function-docs
-    ln -s ${optionsDoc.optionsDocBook} ./config-options.docbook.xml
-
-    ln -s ${pkgs.docbook5}/xml/rng/docbook/docbook.rng ./docbook.rng
-    ln -s ${pkgs.docbook_xsl_ns}/xml/xsl ./xsl
-    ln -s ${epub-xsl} ./epub.xsl
-    ln -s ${xhtml-xsl} ./xhtml.xsl
-
-    ln -s ${../../nixos/doc/xmlformat.conf} ./xmlformat.conf
-    ln -s ${pkgs.documentation-highlighter} ./highlightjs
-
-    echo -n "${version}" > ./version
-  )
-  mv result $out
-''

doc/doc-support/lib-function-docs.nix

@@ -1,36 +0,0 @@
-# Generates the documentation for library functions via nixdoc.
-
-{ pkgs, locationsXml, libsets }:
-
-with pkgs; stdenv.mkDerivation {
-  name = "nixpkgs-lib-docs";
-  src = ../../lib;
-
-  buildInputs = [ nixdoc ];
-  installPhase = ''
-    function docgen {
-      # TODO: wrap lib.$1 in <literal>, make nixdoc not escape it
-      if [[ -e "../lib/$1.nix" ]]; then
-        nixdoc -c "$1" -d "lib.$1: $2" -f "$1.nix" > "$out/$1.xml"
-      else
-        nixdoc -c "$1" -d "lib.$1: $2" -f "$1/default.nix" > "$out/$1.xml"
-      fi
-      echo "<xi:include href='$1.xml' />" >> "$out/index.xml"
-    }
-
-    mkdir -p "$out"
-
-    cat > "$out/index.xml" << 'EOF'
-    <?xml version="1.0" encoding="utf-8"?>
-    <root xmlns:xi="http://www.w3.org/2001/XInclude">
-    EOF
-
-    ${lib.concatMapStrings ({ name, description }: ''
-      docgen ${name} ${lib.escapeShellArg description}
-    '') libsets}
-
-    echo "</root>" >> "$out/index.xml"
-
-    ln -s ${locationsXml} $out/locations.xml
-  '';
-}

doc/doc-support/lib-function-locations.nix

@@ -1,85 +0,0 @@
-{ pkgs, nixpkgs ? { }, libsets }:
-let
-  revision = pkgs.lib.trivial.revisionWithDefault (nixpkgs.revision or "master");
-
-  libDefPos = prefix: set:
-    builtins.concatMap
-      (name: [{
-        name = builtins.concatStringsSep "." (prefix ++ [name]);
-        location = builtins.unsafeGetAttrPos name set;
-      }] ++ nixpkgsLib.optionals
-        (builtins.length prefix == 0 && builtins.isAttrs set.${name})
-        (libDefPos (prefix ++ [name]) set.${name})
-      ) (builtins.attrNames set);
-
-  libset = toplib:
-    builtins.map
-      (subsetname: {
-        subsetname = subsetname;
-        functions = libDefPos [] toplib.${subsetname};
-      })
-      (builtins.map (x: x.name) libsets);
-
-  nixpkgsLib = pkgs.lib;
-
-  flattenedLibSubset = { subsetname, functions }:
-  builtins.map
-    (fn: {
-      name = "lib.${subsetname}.${fn.name}";
-      value = fn.location;
-    })
-    functions;
-
-  locatedlibsets = libs: builtins.map flattenedLibSubset (libset libs);
-  removeFilenamePrefix = prefix: filename:
-    let
-    prefixLen = (builtins.stringLength prefix) + 1; # +1 to remove the leading /
-      filenameLen = builtins.stringLength filename;
-      substr = builtins.substring prefixLen filenameLen filename;
-      in substr;
-
-  removeNixpkgs = removeFilenamePrefix (builtins.toString pkgs.path);
-
-  liblocations =
-    builtins.filter
-      (elem: elem.value != null)
-      (nixpkgsLib.lists.flatten
-        (locatedlibsets nixpkgsLib));
-
-  fnLocationRelative = { name, value }:
-    {
-      inherit name;
-      value = value // { file = removeNixpkgs value.file; };
-    };
-
-  relativeLocs = (builtins.map fnLocationRelative liblocations);
-  sanitizeId = builtins.replaceStrings
-    [ "'"      ]
-    [ "-prime" ];
-
-  urlPrefix = "https://github.com/NixOS/nixpkgs/blob/${revision}";
-  xmlstrings = (nixpkgsLib.strings.concatMapStrings
-      ({ name, value }:
-      ''
-      <section><title>${name}</title>
-        <para xml:id="${sanitizeId name}">
-        Located at
-        <link
-          xlink:href="${urlPrefix}/${value.file}#L${builtins.toString value.line}">${value.file}:${builtins.toString value.line}</link>
-        in  <literal>&lt;nixpkgs&gt;</literal>.
-        </para>
-        </section>
-      '')
-      relativeLocs);
-
-in pkgs.writeText
-    "locations.xml"
-    ''
-    <section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         version="5">
-         <title>All the locations for every lib function</title>
-         <para>This file is only for inclusion by other files.</para>
-         ${xmlstrings}
-    </section>
-    ''

doc/doc-support/parameters.xml

@@ -1,19 +0,0 @@
-<?xml version='1.0'?>
-<xsl:stylesheet
-    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-    version="1.0">
- <xsl:param name="chapter.autolabel" select="0" />
- <xsl:param name="part.autolabel" select="0" />
- <xsl:param name="preface.autolabel" select="0" />
- <xsl:param name="reference.autolabel" select="0" />
- <xsl:param name="section.autolabel" select="0" />
- <xsl:param name="html.stylesheet" select="'style.css overrides.css highlightjs/mono-blue.css'" />
- <xsl:param name="html.script" select="'./highlightjs/highlight.pack.js ./highlightjs/loader.js'" />
- <xsl:param name="xref.with.number.and.title" select="0" />
- <xsl:param name="use.id.as.filename" select="1" />
- <xsl:param name="generate.section.toc.level" select="1" />
- <xsl:param name="toc.section.depth" select="0" />
- <xsl:param name="admon.style" select="''" />
- <xsl:param name="callout.graphics.extension" select="'.svg'" />
- <xsl:param name="generate.consistent.ids" select="1" />
-</xsl:stylesheet>

doc/functions.xml

@@ -1,14 +1,719 @@
 <chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
+	 xmlns:xlink="http://www.w3.org/1999/xlink"
          xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="chap-functions">
+	 xml:id="chap-functions">
  <title>Functions reference</title>
  <para>
-  The nixpkgs repository has several utility functions to manipulate Nix expressions.
+  The nixpkgs repository has several utility functions to manipulate Nix
+  expressions.
  </para>
- <xi:include href="functions/library.xml" />
- <xi:include href="functions/generators.section.xml" />
- <xi:include href="functions/debug.section.xml" />
- <xi:include href="functions/prefer-remote-fetch.section.xml" />
- <xi:include href="functions/nix-gitignore.section.xml" />
+ <section xml:id="sec-overrides">
+  <title>Overriding</title>
+
+  <para>
+   Sometimes one wants to override parts of <literal>nixpkgs</literal>, e.g.
+   derivation attributes, the results of derivations or even the whole package
+   set.
+  </para>
+
+  <section xml:id="sec-pkg-override">
+   <title>&lt;pkg&gt;.override</title>
+
+   <para>
+    The function <varname>override</varname> is usually available for all the
+    derivations in the nixpkgs expression (<varname>pkgs</varname>).
+   </para>
+
+   <para>
+    It is used to override the arguments passed to a function.
+   </para>
+
+   <para>
+    Example usages:
+<programlisting>pkgs.foo.override { arg1 = val1; arg2 = val2; ... }</programlisting>
+<programlisting>import pkgs.path { overlays = [ (self: super: {
+    foo = super.foo.override { barSupport = true ; };
+  })]};</programlisting>
+<programlisting>mypkg = pkgs.callPackage ./mypkg.nix {
+    mydep = pkgs.mydep.override { ... };
+  }</programlisting>
+   </para>
+
+   <para>
+    In the first example, <varname>pkgs.foo</varname> is the result of a
+    function call with some default arguments, usually a derivation. Using
+    <varname>pkgs.foo.override</varname> will call the same function with the
+    given new arguments.
+   </para>
+  </section>
+
+  <section xml:id="sec-pkg-overrideAttrs">
+   <title>&lt;pkg&gt;.overrideAttrs</title>
+
+   <para>
+    The function <varname>overrideAttrs</varname> allows overriding the
+    attribute set passed to a <varname>stdenv.mkDerivation</varname> call,
+    producing a new derivation based on the original one. This function is
+    available on all derivations produced by the
+    <varname>stdenv.mkDerivation</varname> function, which is most packages in
+    the nixpkgs expression <varname>pkgs</varname>.
+   </para>
+
+   <para>
+    Example usage:
+<programlisting>helloWithDebug = pkgs.hello.overrideAttrs (oldAttrs: rec {
+    separateDebugInfo = true;
+  });</programlisting>
+   </para>
+
+   <para>
+    In the above example, the <varname>separateDebugInfo</varname> attribute is
+    overridden to be true, thus building debug info for
+    <varname>helloWithDebug</varname>, while all other attributes will be
+    retained from the original <varname>hello</varname> package.
+   </para>
+
+   <para>
+    The argument <varname>oldAttrs</varname> is conventionally used to refer to
+    the attr set originally passed to <varname>stdenv.mkDerivation</varname>.
+   </para>
+
+   <note>
+    <para>
+     Note that <varname>separateDebugInfo</varname> is processed only by the
+     <varname>stdenv.mkDerivation</varname> function, not the generated, raw
+     Nix derivation. Thus, using <varname>overrideDerivation</varname> will not
+     work in this case, as it overrides only the attributes of the final
+     derivation. It is for this reason that <varname>overrideAttrs</varname>
+     should be preferred in (almost) all cases to
+     <varname>overrideDerivation</varname>, i.e. to allow using
+     <varname>sdenv.mkDerivation</varname> to process input arguments, as well
+     as the fact that it is easier to use (you can use the same attribute names
+     you see in your Nix code, instead of the ones generated (e.g.
+     <varname>buildInputs</varname> vs <varname>nativeBuildInputs</varname>,
+     and involves less typing.
+    </para>
+   </note>
+  </section>
+
+  <section xml:id="sec-pkg-overrideDerivation">
+   <title>&lt;pkg&gt;.overrideDerivation</title>
+
+   <warning>
+    <para>
+     You should prefer <varname>overrideAttrs</varname> in almost all cases,
+     see its documentation for the reasons why.
+     <varname>overrideDerivation</varname> is not deprecated and will continue
+     to work, but is less nice to use and does not have as many abilities as
+     <varname>overrideAttrs</varname>.
+    </para>
+   </warning>
+
+   <warning>
+    <para>
+     Do not use this function in Nixpkgs as it evaluates a Derivation before
+     modifying it, which breaks package abstraction and removes error-checking
+     of function arguments. In addition, this evaluation-per-function
+     application incurs a performance penalty, which can become a problem if
+     many overrides are used. It is only intended for ad-hoc customisation,
+     such as in <filename>~/.config/nixpkgs/config.nix</filename>.
+    </para>
+   </warning>
+
+   <para>
+    The function <varname>overrideDerivation</varname> creates a new derivation
+    based on an existing one by overriding the original's attributes with the
+    attribute set produced by the specified function. This function is
+    available on all derivations defined using the
+    <varname>makeOverridable</varname> function. Most standard
+    derivation-producing functions, such as
+    <varname>stdenv.mkDerivation</varname>, are defined using this function,
+    which means most packages in the nixpkgs expression,
+    <varname>pkgs</varname>, have this function.
+   </para>
+
+   <para>
+    Example usage:
+<programlisting>mySed = pkgs.gnused.overrideDerivation (oldAttrs: {
+    name = "sed-4.2.2-pre";
+    src = fetchurl {
+      url = ftp://alpha.gnu.org/gnu/sed/sed-4.2.2-pre.tar.bz2;
+      sha256 = "11nq06d131y4wmf3drm0yk502d2xc6n5qy82cg88rb9nqd2lj41k";
+    };
+    patches = [];
+  });</programlisting>
+   </para>
+
+   <para>
+    In the above example, the <varname>name</varname>, <varname>src</varname>,
+    and <varname>patches</varname> of the derivation will be overridden, while
+    all other attributes will be retained from the original derivation.
+   </para>
+
+   <para>
+    The argument <varname>oldAttrs</varname> is used to refer to the attribute
+    set of the original derivation.
+   </para>
+
+   <note>
+    <para>
+     A package's attributes are evaluated *before* being modified by the
+     <varname>overrideDerivation</varname> function. For example, the
+     <varname>name</varname> attribute reference in <varname>url =
+     "mirror://gnu/hello/${name}.tar.gz";</varname> is filled-in *before* the
+     <varname>overrideDerivation</varname> function modifies the attribute set.
+     This means that overriding the <varname>name</varname> attribute, in this
+     example, *will not* change the value of the <varname>url</varname>
+     attribute. Instead, we need to override both the <varname>name</varname>
+     *and* <varname>url</varname> attributes.
+    </para>
+   </note>
+  </section>
+
+  <section xml:id="sec-lib-makeOverridable">
+   <title>lib.makeOverridable</title>
+
+   <para>
+    The function <varname>lib.makeOverridable</varname> is used to make the
+    result of a function easily customizable. This utility only makes sense for
+    functions that accept an argument set and return an attribute set.
+   </para>
+
+   <para>
+    Example usage:
+<programlisting>f = { a, b }: { result = a+b; }
+  c = lib.makeOverridable f { a = 1; b = 2; }</programlisting>
+   </para>
+
+   <para>
+    The variable <varname>c</varname> is the value of the <varname>f</varname>
+    function applied with some default arguments. Hence the value of
+    <varname>c.result</varname> is <literal>3</literal>, in this example.
+   </para>
+
+   <para>
+    The variable <varname>c</varname> however also has some additional
+    functions, like <link linkend="sec-pkg-override">c.override</link> which
+    can be used to override the default arguments. In this example the value of
+    <varname>(c.override { a = 4; }).result</varname> is 6.
+   </para>
+  </section>
+ </section>
+ <section xml:id="sec-generators">
+  <title>Generators</title>
+
+  <para>
+   Generators are functions that create file formats from nix data structures,
+   e. g. for configuration files. There are generators available for:
+   <literal>INI</literal>, <literal>JSON</literal> and <literal>YAML</literal>
+  </para>
+
+  <para>
+   All generators follow a similar call interface: <code>generatorName
+   configFunctions data</code>, where <literal>configFunctions</literal> is a
+   set of user-defined functions that format variable parts of the content.
+   They each have common defaults, so often they do not need to be set
+   manually. An example is <code>mkSectionName ? (name: libStr.escape [ "[" "]"
+   ] name)</code> from the <literal>INI</literal> generator. It gets the name
+   of a section and returns a sanitized name. The default
+   <literal>mkSectionName</literal> escapes <literal>[</literal> and
+   <literal>]</literal> with a backslash.
+  </para>
+
+  <note>
+   <para>
+    Nix store paths can be converted to strings by enclosing a derivation
+    attribute like so: <code>"${drv}"</code>.
+   </para>
+  </note>
+
+  <para>
+   Detailed documentation for each generator can be found in
+   <literal>lib/generators.nix</literal>.
+  </para>
+ </section>
+ <section xml:id="sec-fhs-environments">
+  <title>buildFHSUserEnv</title>
+
+  <para>
+   <function>buildFHSUserEnv</function> provides a way to build and run
+   FHS-compatible lightweight sandboxes. It creates an isolated root with bound
+   <filename>/nix/store</filename>, so its footprint in terms of disk space
+   needed is quite small. This allows one to run software which is hard or
+   unfeasible to patch for NixOS -- 3rd-party source trees with FHS
+   assumptions, games distributed as tarballs, software with integrity checking
+   and/or external self-updated binaries. It uses Linux namespaces feature to
+   create temporary lightweight environments which are destroyed after all
+   child processes exit, without root user rights requirement. Accepted
+   arguments are:
+  </para>
+
+  <variablelist>
+   <varlistentry>
+    <term>
+     <literal>name</literal>
+    </term>
+    <listitem>
+     <para>
+      Environment name.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>targetPkgs</literal>
+    </term>
+    <listitem>
+     <para>
+      Packages to be installed for the main host's architecture (i.e. x86_64 on
+      x86_64 installations). Along with libraries binaries are also installed.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>multiPkgs</literal>
+    </term>
+    <listitem>
+     <para>
+      Packages to be installed for all architectures supported by a host (i.e.
+      i686 and x86_64 on x86_64 installations). Only libraries are installed by
+      default.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>extraBuildCommands</literal>
+    </term>
+    <listitem>
+     <para>
+      Additional commands to be executed for finalizing the directory
+      structure.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>extraBuildCommandsMulti</literal>
+    </term>
+    <listitem>
+     <para>
+      Like <literal>extraBuildCommands</literal>, but executed only on multilib
+      architectures.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>extraOutputsToInstall</literal>
+    </term>
+    <listitem>
+     <para>
+      Additional derivation outputs to be linked for both target and
+      multi-architecture packages.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>extraInstallCommands</literal>
+    </term>
+    <listitem>
+     <para>
+      Additional commands to be executed for finalizing the derivation with
+      runner script.
+     </para>
+    </listitem>
+   </varlistentry>
+   <varlistentry>
+    <term>
+     <literal>runScript</literal>
+    </term>
+    <listitem>
+     <para>
+      A command that would be executed inside the sandbox and passed all the
+      command line arguments. It defaults to <literal>bash</literal>.
+     </para>
+    </listitem>
+   </varlistentry>
+  </variablelist>
+
+  <para>
+   One can create a simple environment using a <literal>shell.nix</literal>
+   like that:
+  </para>
+
+<programlisting><![CDATA[
+{ pkgs ? import <nixpkgs> {} }:
+
+(pkgs.buildFHSUserEnv {
+  name = "simple-x11-env";
+  targetPkgs = pkgs: (with pkgs;
+    [ udev
+      alsaLib
+    ]) ++ (with pkgs.xorg;
+    [ libX11
+      libXcursor
+      libXrandr
+    ]);
+  multiPkgs = pkgs: (with pkgs;
+    [ udev
+      alsaLib
+    ]);
+  runScript = "bash";
+}).env
+]]></programlisting>
+
+  <para>
+   Running <literal>nix-shell</literal> would then drop you into a shell with
+   these libraries and binaries available. You can use this to run
+   closed-source applications which expect FHS structure without hassles:
+   simply change <literal>runScript</literal> to the application path, e.g.
+   <filename>./bin/start.sh</filename> -- relative paths are supported.
+  </para>
+ </section>
+ <xi:include href="shell.section.xml" />
+ <section xml:id="sec-pkgs-dockerTools">
+  <title>pkgs.dockerTools</title>
+
+  <para>
+   <varname>pkgs.dockerTools</varname> is a set of functions for creating and
+   manipulating Docker images according to the
+   <link xlink:href="https://github.com/moby/moby/blob/master/image/spec/v1.2.md#docker-image-specification-v120">
+   Docker Image Specification v1.2.0 </link>. Docker itself is not used to
+   perform any of the operations done by these functions.
+  </para>
+
+  <warning>
+   <para>
+    The <varname>dockerTools</varname> API is unstable and may be subject to
+    backwards-incompatible changes in the future.
+   </para>
+  </warning>
+
+  <section xml:id="ssec-pkgs-dockerTools-buildImage">
+   <title>buildImage</title>
+
+   <para>
+    This function is analogous to the <command>docker build</command> command,
+    in that can used to build a Docker-compatible repository tarball containing
+    a single image with one or multiple layers. As such, the result is suitable
+    for being loaded in Docker with <command>docker load</command>.
+   </para>
+
+   <para>
+    The parameters of <varname>buildImage</varname> with relative example
+    values are described below:
+   </para>
+
+   <example xml:id='ex-dockerTools-buildImage'>
+    <title>Docker build</title>
+<programlisting>
+  buildImage {
+    name = "redis"; <co xml:id='ex-dockerTools-buildImage-1' />
+    tag = "latest"; <co xml:id='ex-dockerTools-buildImage-2' />
+
+    fromImage = someBaseImage; <co xml:id='ex-dockerTools-buildImage-3' />
+    fromImageName = null; <co xml:id='ex-dockerTools-buildImage-4' />
+    fromImageTag = "latest"; <co xml:id='ex-dockerTools-buildImage-5' />
+
+    contents = pkgs.redis; <co xml:id='ex-dockerTools-buildImage-6' />
+    runAsRoot = '' <co xml:id='ex-dockerTools-buildImage-runAsRoot' />
+      #!${stdenv.shell}
+      mkdir -p /data
+    '';
+
+    config = { <co xml:id='ex-dockerTools-buildImage-8' />
+      Cmd = [ "/bin/redis-server" ];
+      WorkingDir = "/data";
+      Volumes = {
+        "/data" = {};
+      };
+    };
+  }
+  </programlisting>
+   </example>
+
+   <para>
+    The above example will build a Docker image <literal>redis/latest</literal>
+    from the given base image. Loading and running this image in Docker results
+    in <literal>redis-server</literal> being started automatically.
+   </para>
+
+   <calloutlist>
+    <callout arearefs='ex-dockerTools-buildImage-1'>
+     <para>
+      <varname>name</varname> specifies the name of the resulting image. This
+      is the only required argument for <varname>buildImage</varname>.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-2'>
+     <para>
+      <varname>tag</varname> specifies the tag of the resulting image. By
+      default it's <literal>latest</literal>.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-3'>
+     <para>
+      <varname>fromImage</varname> is the repository tarball containing the
+      base image. It must be a valid Docker image, such as exported by
+      <command>docker save</command>. By default it's <literal>null</literal>,
+      which can be seen as equivalent to <literal>FROM scratch</literal> of a
+      <filename>Dockerfile</filename>.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-4'>
+     <para>
+      <varname>fromImageName</varname> can be used to further specify the base
+      image within the repository, in case it contains multiple images. By
+      default it's <literal>null</literal>, in which case
+      <varname>buildImage</varname> will peek the first image available in the
+      repository.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-5'>
+     <para>
+      <varname>fromImageTag</varname> can be used to further specify the tag of
+      the base image within the repository, in case an image contains multiple
+      tags. By default it's <literal>null</literal>, in which case
+      <varname>buildImage</varname> will peek the first tag available for the
+      base image.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-6'>
+     <para>
+      <varname>contents</varname> is a derivation that will be copied in the
+      new layer of the resulting image. This can be similarly seen as
+      <command>ADD contents/ /</command> in a <filename>Dockerfile</filename>.
+      By default it's <literal>null</literal>.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-runAsRoot'>
+     <para>
+      <varname>runAsRoot</varname> is a bash script that will run as root in an
+      environment that overlays the existing layers of the base image with the
+      new resulting layer, including the previously copied
+      <varname>contents</varname> derivation. This can be similarly seen as
+      <command>RUN ...</command> in a <filename>Dockerfile</filename>.
+      <note>
+       <para>
+        Using this parameter requires the <literal>kvm</literal> device to be
+        available.
+       </para>
+      </note>
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-buildImage-8'>
+     <para>
+      <varname>config</varname> is used to specify the configuration of the
+      containers that will be started off the built image in Docker. The
+      available options are listed in the
+      <link xlink:href="https://github.com/moby/moby/blob/master/image/spec/v1.2.md#image-json-field-descriptions">
+      Docker Image Specification v1.2.0 </link>.
+     </para>
+    </callout>
+   </calloutlist>
+
+   <para>
+    After the new layer has been created, its closure (to which
+    <varname>contents</varname>, <varname>config</varname> and
+    <varname>runAsRoot</varname> contribute) will be copied in the layer
+    itself. Only new dependencies that are not already in the existing layers
+    will be copied.
+   </para>
+
+   <para>
+    At the end of the process, only one new single layer will be produced and
+    added to the resulting image.
+   </para>
+
+   <para>
+    The resulting repository will only list the single image
+    <varname>image/tag</varname>. In the case of
+    <xref linkend='ex-dockerTools-buildImage'/> it would be
+    <varname>redis/latest</varname>.
+   </para>
+
+   <para>
+    It is possible to inspect the arguments with which an image was built using
+    its <varname>buildArgs</varname> attribute.
+   </para>
+
+   <note>
+    <para>
+     If you see errors similar to <literal>getProtocolByName: does not exist
+     (no such protocol name: tcp)</literal> you may need to add
+     <literal>pkgs.iana-etc</literal> to <varname>contents</varname>.
+    </para>
+   </note>
+
+   <note>
+    <para>
+     If you see errors similar to <literal>Error_Protocol ("certificate has
+     unknown CA",True,UnknownCa)</literal> you may need to add
+     <literal>pkgs.cacert</literal> to <varname>contents</varname>.
+    </para>
+   </note>
+  </section>
+
+  <section xml:id="ssec-pkgs-dockerTools-fetchFromRegistry">
+   <title>pullImage</title>
+
+   <para>
+    This function is analogous to the <command>docker pull</command> command,
+    in that can be used to fetch a Docker image from a Docker registry.
+    Currently only registry <literal>v1</literal> is supported. By default
+    <link xlink:href="https://hub.docker.com/">Docker Hub</link> is used to
+    pull images.
+   </para>
+
+   <para>
+    Its parameters are described in the example below:
+   </para>
+
+   <example xml:id='ex-dockerTools-pullImage'>
+    <title>Docker pull</title>
+<programlisting>
+  pullImage {
+    imageName = "debian"; <co xml:id='ex-dockerTools-pullImage-1' />
+    imageTag = "jessie"; <co xml:id='ex-dockerTools-pullImage-2' />
+    imageId = null; <co xml:id='ex-dockerTools-pullImage-3' />
+    sha256 = "1bhw5hkz6chrnrih0ymjbmn69hyfriza2lr550xyvpdrnbzr4gk2"; <co xml:id='ex-dockerTools-pullImage-4' />
+
+    indexUrl = "https://index.docker.io"; <co xml:id='ex-dockerTools-pullImage-5' />
+    registryVersion = "v1";
+  }
+  </programlisting>
+   </example>
+
+   <calloutlist>
+    <callout arearefs='ex-dockerTools-pullImage-1'>
+     <para>
+      <varname>imageName</varname> specifies the name of the image to be
+      downloaded, which can also include the registry namespace (e.g.
+      <literal>library/debian</literal>). This argument is required.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-pullImage-2'>
+     <para>
+      <varname>imageTag</varname> specifies the tag of the image to be
+      downloaded. By default it's <literal>latest</literal>.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-pullImage-3'>
+     <para>
+      <varname>imageId</varname>, if specified this exact image will be
+      fetched, instead of <varname>imageName/imageTag</varname>. However, the
+      resulting repository will still be named
+      <varname>imageName/imageTag</varname>. By default it's
+      <literal>null</literal>.
+     </para>
+    </callout>
+    <callout arearefs='ex-dockerTools-pullImage-4'>
+     <para>
+      <varname>sha256</varname> is the checksum of the whole fetched image.
+      This argument is required.
+     </para>
+     <note>
+      <para>
+       The checksum is computed on the unpacked directory, not on the final
+       tarball.
+      </para>
+     </note>
+    </callout>
+    <callout arearefs='ex-dockerTools-pullImage-5'>
+     <para>
+      In the above example the default values are shown for the variables
+      <varname>indexUrl</varname> and <varname>registryVersion</varname>. Hence
+      by default the Docker.io registry is used to pull the images.
+     </para>
+    </callout>
+   </calloutlist>
+  </section>
+
+  <section xml:id="ssec-pkgs-dockerTools-exportImage">
+   <title>exportImage</title>
+
+   <para>
+    This function is analogous to the <command>docker export</command> command,
+    in that can used to flatten a Docker image that contains multiple layers.
+    It is in fact the result of the merge of all the layers of the image. As
+    such, the result is suitable for being imported in Docker with
+    <command>docker import</command>.
+   </para>
+
+   <note>
+    <para>
+     Using this function requires the <literal>kvm</literal> device to be
+     available.
+    </para>
+   </note>
+
+   <para>
+    The parameters of <varname>exportImage</varname> are the following:
+   </para>
+
+   <example xml:id='ex-dockerTools-exportImage'>
+    <title>Docker export</title>
+<programlisting>
+  exportImage {
+    fromImage = someLayeredImage;
+    fromImageName = null;
+    fromImageTag = null;
+
+    name = someLayeredImage.name;
+  }
+  </programlisting>
+   </example>
+
+   <para>
+    The parameters relative to the base image have the same synopsis as
+    described in <xref linkend='ssec-pkgs-dockerTools-buildImage'/>, except
+    that <varname>fromImage</varname> is the only required argument in this
+    case.
+   </para>
+
+   <para>
+    The <varname>name</varname> argument is the name of the derivation output,
+    which defaults to <varname>fromImage.name</varname>.
+   </para>
+  </section>
+
+  <section xml:id="ssec-pkgs-dockerTools-shadowSetup">
+   <title>shadowSetup</title>
+
+   <para>
+    This constant string is a helper for setting up the base files for managing
+    users and groups, only if such files don't exist already. It is suitable
+    for being used in a <varname>runAsRoot</varname>
+    <xref linkend='ex-dockerTools-buildImage-runAsRoot'/> script for cases like
+    in the example below:
+   </para>
+
+   <example xml:id='ex-dockerTools-shadowSetup'>
+    <title>Shadow base files</title>
+<programlisting>
+  buildImage {
+    name = "shadow-basic";
+
+    runAsRoot = ''
+      #!${stdenv.shell}
+      ${shadowSetup}
+      groupadd -r redis
+      useradd -r -g redis redis
+      mkdir /data
+      chown redis:redis /data
+    '';
+  }
+  </programlisting>
+   </example>
+
+   <para>
+    Creating base files like <literal>/etc/passwd</literal> or
+    <literal>/etc/login.defs</literal> are necessary for shadow-utils to
+    manipulate users and groups.
+   </para>
+  </section>
+ </section>
 </chapter>