Revert "nixos/fonts: Add unifont to list of default fonts."

This reverts commit 53746ff9d2 because
it increases default system closure size significantly. It's also
unnecessary - people can always add fonts themselves.

.editorconfig

@@ -1,82 +0,0 @@
-# EditorConfig configuration for nixpkgs
-# https://EditorConfig.org
-
-# Top-most EditorConfig file
-root = true
-
-# Unix-style newlines with a newline ending every file, utf-8 charset
-[*]
-end_of_line = lf
-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}]
-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}]
-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
-
-[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

.git-blame-ignore-revs

@@ -1,32 +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
-
-# nixos: fix module paths in rename.nix
-d08ede042b74b8199dc748323768227b88efcf7c

.gitattributes

@@ -1,16 +0,0 @@
-**/deps.nix 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

@@ -1,286 +0,0 @@
-# CODEOWNERS file
-#
-# This file is used to describe who owns what in this repository. This file does not
-# replace `meta.maintainers` but is instead used for other things than derivations
-# and modules, like documentation, package sets, and other assets.
-#
-# 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
-
-# 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/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 @aszlig
-
-# Nixpkgs build-support
-/pkgs/build-support/writers @lassulus @Profpatsch
-
-# Nixpkgs documentation
-/maintainers/scripts/db-to-md.sh @jtojnar @ryantm
-/maintainers/scripts/doc @jtojnar @ryantm
-/doc/build-aux/pandoc-filters @jtojnar
-/doc/contributing/contributing-to-documentation.chapter.md @jtojnar
-
-# NixOS Internals
-/nixos/default.nix          @nbp @infinisil
-/nixos/lib/from-env.nix     @nbp @infinisil
-/nixos/lib/eval-config.nix  @nbp @infinisil
-/nixos/doc/manual/configuration/abstractions.xml      @nbp
-/nixos/doc/manual/configuration/config-file.xml       @nbp
-/nixos/doc/manual/configuration/config-syntax.xml     @nbp
-/nixos/doc/manual/configuration/modularity.xml        @nbp
-/nixos/doc/manual/development/assertions.xml          @nbp
-/nixos/doc/manual/development/meta-attributes.xml     @nbp
-/nixos/doc/manual/development/option-declarations.xml @nbp
-/nixos/doc/manual/development/option-def.xml          @nbp
-/nixos/doc/manual/development/option-types.xml        @nbp
-/nixos/doc/manual/development/replace-modules.xml     @nbp
-/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 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
-/pkgs/development/tools/poetry2nix                          @adisbladis
-/pkgs/development/interpreters/python/hooks                 @FRidh @jonringer
-
-# Haskell
-/doc/languages-frameworks/haskell.section.md  @cdepillabout @sternenseemann @maralorn @expipiplus1
-/maintainers/scripts/haskell                  @cdepillabout @sternenseemann @maralorn @expipiplus1
-/pkgs/development/compilers/ghc               @cdepillabout @sternenseemann @maralorn @expipiplus1
-/pkgs/development/haskell-modules             @cdepillabout @sternenseemann @maralorn @expipiplus1
-/pkgs/test/haskell                            @cdepillabout @sternenseemann @maralorn @expipiplus1
-/pkgs/top-level/release-haskell.nix           @cdepillabout @sternenseemann @maralorn @expipiplus1
-/pkgs/top-level/haskell-packages.nix          @cdepillabout @sternenseemann @maralorn @expipiplus1
-
-# Perl
-/pkgs/development/interpreters/perl @stigtsp @zakame
-/pkgs/top-level/perl-packages.nix   @stigtsp @zakame
-/pkgs/development/perl-modules      @stigtsp @zakame
-
-# R
-/pkgs/applications/science/math/R   @jbedo
-/pkgs/development/r-modules         @jbedo
-
-# Ruby
-/pkgs/development/interpreters/ruby @marsam
-/pkgs/development/ruby-modules      @marsam
-
-# Rust
-/pkgs/development/compilers/rust @Mic92 @LnL7 @zowoq
-/pkgs/build-support/rust @zowoq
-/doc/languages-frameworks/rust.section.md @zowoq
-
-# 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
-
-# Jetbrains
-/pkgs/applications/editors/jetbrains @edwtjo
-
-# Licenses
-/lib/licenses.nix @alyssais
-
-# 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/tests/babeld.nix @mweinelt
-/nixos/tests/kea.nix @mweinelt
-/nixos/tests/knot.nix @mweinelt
-
-# Dhall
-/pkgs/development/dhall-modules      @Gabriel439 @Profpatsch @ehmry
-/pkgs/development/interpreters/dhall @Gabriel439 @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      @jonringer @teto
-
-# VimPlugins
-/pkgs/applications/editors/vim/plugins         @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/development/compilers/go @kalbasit @Mic92 @zowoq
-/pkgs/development/go-modules   @kalbasit @Mic92 @zowoq
-/pkgs/development/go-packages  @kalbasit @Mic92 @zowoq
-
-# GNOME
-/pkgs/desktops/gnome                              @jtojnar @hedning
-/pkgs/desktops/gnome/extensions       @piegamesde @jtojnar @hedning
-
-# 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
-/pkgs/servers/matrix-synapse/matrix-appservice-irc         @piegamesde
-/nixos/modules/services/misc/heisenbridge.nix              @piegamesde
-/nixos/modules/services/misc/matrix-appservice-irc.nix     @piegamesde
-/nixos/modules/services/misc/matrix-conduit.nix            @piegamesde
-/nixos/tests/matrix-appservice-irc.nix                     @piegamesde
-/nixos/tests/matrix-conduit.nix                            @piegamesde

.github/ISSUE_TEMPLATE.md

@@ -1,11 +0,0 @@
-## Issue description
-
-
-
-### Steps to reproduce
-
-
-
-## Technical details
-
-Please run `nix-shell -p nix-info --run "nix-info -m"` and paste the result.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,40 +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/out_of_date_package_report.md

@@ -1,48 +0,0 @@
----
-name: Out-of-date package reports
-about: For packages that are out-of-date
-title: ''
-labels: '9.needs: package (update)'
-assignees: ''
-
----
-
-
-###### Checklist
-
-<!-- Note that these are hard requirements -->
-
-<!--
-You can use the "Go to file" functionality on GitHub to find the package
-Then you can go to the history for this package
-Find the latest "package_name: old_version -> new_version" commit
-The "new_version" is the current version of the package
--->
-- [ ] Checked the [nixpkgs master branch](https://github.com/NixOS/nixpkgs)
-<!--
-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)
-
-###### Project name
-`nix search` name:
-<!--
-The current version can be found easily with the same process as above for checking the master branch
-If an open PR is present for the package, take this version as the current one and link to the PR
--->
-current version:
-desired version:
-
-###### Notify maintainers
-<!--
-Search your package here: https://search.nixos.org/packages?channel=unstable
-If no maintainer is listed for your package, tag the person that last updated the package
--->
-
-maintainers:
-
-###### Note for maintainers
-
-Please tag this issue in your PR.

.github/ISSUE_TEMPLATE/packaging_request.md

@@ -1,18 +0,0 @@
----
-name: Packaging requests
-about: For packages that are missing
-title: ''
-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/PULL_REQUEST_TEMPLATE.md

@@ -1,41 +0,0 @@
-###### Description of changes
-
-<!--
-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. -->
-
-- 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/`)
-- [22.05 Release Notes (or backporting 21.11 Release notes)](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#generating-2205-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
-  - [ ] (Release notes changes) Ran `nixos/doc/manual/md-to-db.sh` to update generated release notes
-- [ ] Fits [CONTRIBUTING.md](https://github.com/NixOS/nixpkgs/blob/master/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

@@ -1,35 +0,0 @@
-# Stale bot information
-
-- Thanks for your contribution!
-- 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/labeler.yml

@@ -1,159 +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/**/*
-
-"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: 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/development/compilers/go/**/*
-  - pkgs/development/go-modules/**/*
-  - pkgs/development/go-packages/**/*
-
-"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: 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: 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

@@ -1,10 +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: |
-  I marked this as stale due to inactivity. → [More info](https://github.com/NixOS/nixpkgs/blob/master/.github/STALE-BOT.md)
-closeComment: false

.github/workflows/backport.yml

@@ -1,35 +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.
-
-jobs:
-  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:
-          # required to find all branches
-          fetch-depth: 0
-          ref: ${{ github.event.pull_request.head.sha }}
-      - name: Create backport PRs
-        # should be kept in sync with `version`
-        uses: zeebe-io/backport-action@v0.0.5
-        with:
-          # Config README: https://github.com/zeebe-io/backport-action#backport-action
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          github_workspace: ${{ github.workspace }}
-          # should be kept in sync with `uses`
-          version: v0.0.5
-          pull_description: |-
-            Bot-based backport to `${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

@@ -1,26 +0,0 @@
-name: Basic evaluation checks
-
-on:
-  workflow_dispatch
-  # pull_request:
-  #   branches:
-  #    - master
-  #    - release-**
-  # push:
-  #   branches:
-  #    - master
-  #    - release-**
-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@v17
-    - uses: cachix/cachix-action@v10
-      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/direct-push.yml

@@ -1,32 +0,0 @@
-name: "Direct Push Warning"
-on:
-  push:
-    branches:
-     - master
-     - release-**
-jobs:
-  build:
-    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 "::set-output name=ismerge::$ISMERGE"
-    # github events are eventually consistent, so wait until changes propagate to thier DB
-    - run: sleep 60
-      if: steps.ismerge.outputs.ismerge != 'true'
-    - name: Warn if the commit was a direct push
-      if: steps.ismerge.outputs.ismerge != 'true'
-      uses: peter-evans/commit-comment@v2
-      with:
-        body: |
-          @${{ 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 editorconfig]')"
-    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/${{ github.event.pull_request.number }}/merge
-    - uses: cachix/install-nix-action@v17
-      with:
-        # nixpkgs commit is pinned so that it doesn't break
-        # editorconfig-checker 2.4.0
-        nix_path: nixpkgs=https://github.com/NixOS/nixpkgs/archive/c473cc8714710179df205b153f4e9fa007107ff9.tar.gz
-    - name: install editorconfig-checker
-      run: nix-env -iA editorconfig-checker -f '<nixpkgs>'
-    - name: Checking EditorConfig
-      run: |
-        cat "$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'
-    steps:
-    - uses: actions/labeler@v4
-      with:
-        repo-token: ${{ secrets.GITHUB_TOKEN }}
-        sync-labels: true

.github/workflows/manual-nixos.yml

@@ -1,31 +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/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v17
-        with:
-          # explicitly enable sandbox
-          extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v10
-        with:
-          # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
-          name: nixpkgs-ci
-          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
-      - name: Building NixOS manual
-        run: NIX_PATH=nixpkgs=$(pwd) nix-build --option restrict-eval true 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/${{ github.event.pull_request.number }}/merge
-      - uses: cachix/install-nix-action@v17
-        with:
-          # explicitly enable sandbox
-          extra_nix_config: sandbox = true
-      - uses: cachix/cachix-action@v10
-        with:
-          # This cache is for the nixpkgs repo checks and should not be trusted or used elsewhere.
-          name: nixpkgs-ci
-          signingKey: '${{ 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/nixos-manual.yml

@@ -1,26 +0,0 @@
-name: NixOS manual checks
-
-permissions: read-all
-
-on:
-  pull_request_target:
-    branches-ignore:
-      - 'release-**'
-    paths:
-      - 'nixos/**/*.xml'
-      - 'nixos/**/*.md'
-
-jobs:
-  tests:
-    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@v17
-    - name: Check DocBook files generated from Markdown are consistent
-      run: |
-        nixos/doc/manual/md-to-db.sh
-        git diff --exit-code

.github/workflows/no-channel.yml

@@ -1,21 +0,0 @@
-name: "No channel PR"
-
-on:
-  pull_request:
-    branches:
-      - 'nixos-**'
-      - 'nixpkgs-**'
-
-jobs:
-  fail:
-    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/pending-clear.yml

@@ -1,21 +0,0 @@
-name: "clear pending status"
-
-on:
-  check_suite:
-    types: [ completed ]
-
-jobs:
-  action:
-    runs-on: ubuntu-latest
-    steps:
-    - name: clear pending status
-      if: github.repository_owner == 'NixOS' && github.event.check_suite.app.name == 'OfBorg'
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: |
-        curl \
-          -X POST \
-          -H "Accept: application/vnd.github.v3+json" \
-          -H "Authorization: token $GITHUB_TOKEN" \
-          -d '{"state": "success", "target_url": " ", "description": " ", "context": "Wait for ofborg"}' \
-          "https://api.github.com/repos/NixOS/nixpkgs/statuses/${{ github.event.check_suite.head_sha }}"

.github/workflows/pending-set.yml

@@ -1,25 +0,0 @@
-name: "set pending status"
-
-on:
-  pull_request_target:
-
-# 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.
-
-jobs:
-  action:
-    runs-on: ubuntu-latest
-    steps:
-    - name: set pending status
-      if: github.repository_owner == 'NixOS'
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      run: |
-        curl \
-          -X POST \
-          -H "Accept: application/vnd.github.v3+json" \
-          -H "Authorization: token $GITHUB_TOKEN" \
-          -d '{"state": "pending", "target_url": " ", "description": "This pending status will be cleared when ofborg starts eval.", "context": "Wait for ofborg"}' \
-          "https://api.github.com/repos/NixOS/nixpkgs/statuses/${{ github.event.pull_request.head.sha }}"

.github/workflows/periodic-merge-24h.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 (24h)"
-
-
-on:
-  schedule:
-    # * is a special character in YAML so you have to quote this string
-    # Merge every 24 hours
-    - cron:  '0 0 * * *'
-
-jobs:
-  periodic-merge:
-    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-21.05
-            into: staging-next-21.05
-          - from: staging-next-21.05
-            into: staging-21.05
-          - from: release-21.11
-            into: staging-next-21.11
-          - from: staging-next-21.11
-            into: staging-21.11
-    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

@@ -1,51 +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 * * *'
-
-jobs:
-  periodic-merge:
-    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

@@ -1,47 +0,0 @@
-name: "Update terraform-providers"
-
-on:
-  schedule:
-    - cron: "14 3 * * 1"
-  workflow_dispatch:
-
-jobs:
-  tf-providers:
-    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@v17
-      - name: setup
-        id: setup
-        run: |
-          echo ::set-output name=title::"terraform-providers: update $(date -u +"%Y-%m-%d")"
-      - name: update terraform-providers
-        run: |
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git config user.name "github-actions[bot]"
-          pushd pkgs/applications/networking/cluster/terraform-providers
-          ./update-all-providers --no-build
-          git commit -m "${{ steps.setup.outputs.title }}" providers.json
-          popd
-      - name: create PR
-        uses: peter-evans/create-pull-request@v3
-        with:
-          body: |
-            Automatic update of terraform providers.
-
-            Created by [update-terraform-providers](https://github.com/NixOS/nixpkgs/blob/master/.github/workflows/update-terraform-providers.yml) action.
-
-            Check that all providers build with `@ofborg build terraform-full`
-          branch: terraform-providers-update
-          delete-branch: false
-          labels: "2.status: work-in-progress"
-          title: ${{ steps.setup.outputs.title }}
-          token: ${{ secrets.GITHUB_TOKEN }}
-      - name: comment on failure
-        uses: peter-evans/create-or-update-comment@v2
-        if: ${{ failure() }}
-        with:
-          issue-number: 153416
-          body: |
-            Automatic update of terraform providers [failed](https://github.com/NixOS/nixpkgs/actions/runs/${{ github.run_id }}).

.gitignore

@@ -2,12 +2,8 @@
 ,*
 .*.swp
 .*.swo
-.idea/
-.vscode/
-outputs/
 result
 result-*
-source/
 /doc/NEWS.html
 /doc/NEWS.txt
 /doc/manual.html
@@ -15,15 +11,8 @@ source/
 .version-suffix
 
 .DS_Store
-.mypy_cache
-__pycache__
 
+/pkgs/applications/kde-apps-*/tmp/
+/pkgs/development/libraries/kde-frameworks-*/tmp/
 /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/plasma-*/tmp/

.travis.yml

@@ -0,0 +1,6 @@
+language: python
+python: "3.4"
+sudo: required
+before_install: ./maintainers/scripts/travis-nox-review-pr.sh nix
+install: ./maintainers/scripts/travis-nox-review-pr.sh nox
+script: ./maintainers/scripts/travis-nox-review-pr.sh build

.version

@@ -1 +1 @@
-22.05
+15.09

CONTRIBUTING.md

@@ -1,130 +1,12 @@
 # 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
+* [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
 
-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 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 `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).
-
-## 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.
-
-For package version upgrades and such a one-line commit message is usually sufficient.
-
-## 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 see a rebase from `master` onto the merge base
-between `master` and `staging`, so that a change can eventually be retargeted to
-`staging`. The example uses `upstream` as the remote for `NixOS/nixpkgs.git`
-while the `origin` remote is used for the remote you are pushing to.
-
-
-```console
-# Find the common base between two branches
-common=$(git merge-base upstream/master upstream/staging)
-# Find the common base between your feature branch and master
-commits=$(git merge-base $(git branch --show-current) upstream/master)
-# Rebase all commits onto the common base
-git rebase --onto=$common $commits
-# Force push your changes
-git push origin $(git branch --show-current) --force-with-lease
-```
-
-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 $(git branch --show-current) --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).
-
-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-21.11`. Do not use a _channel branch_ like `nixos-21.11` or `nixpkgs-21.11-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-21.11`) as the target branch of the pull request, and link to the pull request in which the original change was comitted to `master`. The pull request title should be the commit title with the release version as prefix, e.g. `[21.11]`.
-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 22.05 Release Notes
-
-(This section also applies to backporting 21.11 release notes: substitute "rl-2205" for "rl-2111".)
-
-Documentation in nixpkgs is transitioning to a markdown-centric workflow. Release notes now require a translation step to convert from markdown to a compatible docbook document.
-
-Steps for updating 22.05 Release notes:
-
-1. Edit `nixos/doc/manual/release-notes/rl-2205.section.md` with the desired changes
-2. Run `./nixos/doc/manual/md-to-db.sh` to render `nixos/doc/manual/from_md/release-notes/rl-2205.section.xml`
-3. Include changes to `rl-2205.section.md` and `rl-2205.section.xml` in the same commit.
-
-## Reviewing contributions
-
-See the nixpkgs manual for more details on how to [Review contributions](https://nixos.org/nixpkgs/manual/#chap-reviewing-contributions).
+See the nixpkgs manual for details on how to [Submit changes to nixpkgs](http://hydra.nixos.org/job/nixpkgs/trunk/manual/latest/download-by-type/doc/manual#chap-submitting-changes).

COPYING

@@ -1,4 +1,4 @@
-Copyright (c) 2003-2022 Eelco Dolstra and the Nixpkgs/NixOS contributors
+Copyright (c) 2003-2006 Eelco Dolstra
 
 Permission is hereby granted, free of charge, to any person obtaining
 a copy of this software and associated documentation files (the
@@ -18,3 +18,14 @@ 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.).  Also, the license does not apply
+to some of the binaries used for bootstrapping Nixpkgs (e.g.,
+pkgs/stdenv/linux/tools/bash).  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 +1,44 @@
-<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="http://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>
+[![Build Status](https://travis-ci.org/NixOS/nixpkgs.svg?branch=master)](https://travis-ci.org/NixOS/nixpkgs)
+[![Issue Stats](http://www.issuestats.com/github/nixos/nixpkgs/badge/pr)](http://www.issuestats.com/github/nixos/nixpkgs)
+[![Issue Stats](http://www.issuestats.com/github/nixos/nixpkgs/badge/issue)](http://www.issuestats.com/github/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](http://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-14.12` for the latest
+release and `nixos-unstable` for the latest successful build of master:
 
-# Community
+```
+% git remote update channels
+% git rebase channels/nixos-14.12
+```
 
-* [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/)
 * [Continuous package builds for unstable/master](https://hydra.nixos.org/jobset/nixos/trunk-combined)
-* [Continuous package builds for the NixOS 21.11 release](https://hydra.nixos.org/jobset/nixos/release-21.11)
+* [Continuous package builds for 14.12 release](https://hydra.nixos.org/jobset/nixos/release-14.12)
+* [Continuous package builds for 15.09 release](https://hydra.nixos.org/jobset/nixos/release-15.09)
 * [Tests for unstable/master](https://hydra.nixos.org/job/nixos/trunk-combined/tested#tabs-constituents)
-* [Tests for the NixOS 21.11 release](https://hydra.nixos.org/job/nixos/release-21.11/tested#tabs-constituents)
+* [Tests for 14.12 release](https://hydra.nixos.org/job/nixos/release-14.12/tested#tabs-constituents)
+* [Tests for 15.09 release](https://hydra.nixos.org/job/nixos/release-15.09/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](http://lists.science.uu.nl/mailman/listinfo/nix-dev)
+* [IRC - #nixos on freenode.net](irc://irc.freenode.net/#nixos)

default.nix

@@ -1,28 +1,7 @@
-let requiredVersion = import ./lib/minver.nix; in
+if ! builtins ? nixVersion || builtins.compareVersions "1.8" builtins.nixVersion == 1 then
 
-if ! builtins ? nixVersion || builtins.compareVersions requiredVersion builtins.nixVersion == 1 then
-
-  abort ''
-
-    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 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
-  ''
+  abort "This version of Nixpkgs requires Nix >= 1.8, please upgrade! See https://nixos.org/wiki/How_to_update_when_nix_is_too_old_to_evaluate_nixpkgs"
 
 else
 
-  import ./pkgs/top-level/impure.nix
+  import ./pkgs/top-level/all-packages.nix

doc/.gitignore

@@ -1,8 +0,0 @@
-*.chapter.xml
-*.section.xml
-.version
-functions/library/generated
-functions/library/locations.xml
-highlightjs
-manual-full.xml
-out

doc/Makefile

@@ -1,116 +0,0 @@
-MD_TARGETS=$(addsuffix .xml, $(basename $(shell find . -type f -regex '.*\.md$$' -not -name README.md)))
-
-PANDOC ?= pandoc
-
-pandoc_media_dir = media
-# NOTE: Keep in sync with NixOS manual (/nixos/doc/manual/md-to-db.sh) and conversion script (/maintainers/scripts/db-to-md.sh).
-# TODO: Remove raw-attribute when we can get rid of DocBook altogether.
-pandoc_commonmark_enabled_extensions = +attributes+fenced_divs+footnotes+bracketed_spans+definition_lists+pipe_tables+raw_attribute
-# Not needed:
-# - docbook-reader/citerefentry-to-rst-role.lua (only relevant for DocBook → MarkDown/rST/MyST)
-pandoc_flags = --extract-media=$(pandoc_media_dir) \
-	--lua-filter=$(PANDOC_LUA_FILTERS_DIR)/diagram-generator.lua \
-	--lua-filter=build-aux/pandoc-filters/myst-reader/roles.lua \
-	--lua-filter=build-aux/pandoc-filters/link-unix-man-references.lua \
-	--lua-filter=build-aux/pandoc-filters/docbook-writer/rst-roles.lua \
-	--lua-filter=build-aux/pandoc-filters/docbook-writer/labelless-link-is-xref.lua \
-	-f commonmark$(pandoc_commonmark_enabled_extensions)+smart
-
-.PHONY: all
-all: validate format out/html/index.html out/epub/manual.epub
-
-.PHONY: debug
-debug:
-	nix-shell --run "xmloscopy --docbook5 ./manual.xml ./manual-full.xml"
-
-.PHONY: format
-format: doc-support/result
-	find . -iname '*.xml' -type f | while read f; do \
-		echo $$f ;\
-		xmlformat --config-file "doc-support/result/xmlformat.conf" -i $$f ;\
-	done
-
-.PHONY: fix-misc-xml
-fix-misc-xml:
-	find . -iname '*.xml' -type f \
-		-exec ../nixos/doc/varlistentry-fixer.rb {} ';'
-
-.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
-
-.PHONY: validate
-validate: manual-full.xml doc-support/result
-	jing doc-support/result/docbook.rng manual-full.xml
-
-out/html/index.html: doc-support/result manual-full.xml style.css highlightjs
-	mkdir -p out/html
-	xsltproc \
-		--nonet --xinclude \
-		--output $@ \
-		doc-support/result/xhtml.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/
-	chmod u+w -R out/html/
-
-out/epub/manual.epub: manual-full.xml
-	mkdir -p out/epub/scratch
-	xsltproc --nonet \
-		--output out/epub/scratch/ \
-		doc-support/result/epub.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/
-	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
-	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/
-
-
-manual-full.xml: ${MD_TARGETS} .version functions/library/locations.xml functions/library/generated *.xml **/*.xml **/**/*.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
-
-%.section.xml: %.section.md
-	$(PANDOC) $^ -t docbook \
-		$(pandoc_flags) \
-		-o $@
-
-%.chapter.xml: %.chapter.md
-	$(PANDOC) $^ -t docbook \
-		--top-level-division=chapter \
-		$(pandoc_flags) \
-		-o $@

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

@@ -1,36 +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'
-    end
-
-    if tag ~= nil then
-      return pandoc.RawInline('docbook', '<' .. tag .. '>' .. content .. '</' .. tag .. '>')
-    end
-  end
-end

doc/build-aux/pandoc-filters/link-unix-man-references.lua

@@ -1,17 +0,0 @@
---[[
-Turns a manpage reference into a link, when a mapping is defined below.
-]]
-
-local man_urls = {
-  ["tmpfiles.d(5)"] = "https://www.freedesktop.org/software/systemd/man/tmpfiles.d.html",
-  ["nix.conf(5)"] = "https://nixos.org/manual/nix/stable/#sec-conf-file",
-  ["systemd.time(7)"] = "https://www.freedesktop.org/software/systemd/man/systemd.time.html",
-  ["systemd.timer(5)"] = "https://www.freedesktop.org/software/systemd/man/systemd.timer.html",
-}
-
-function Code(elem)
-  local is_man_role = elem.classes:includes('interpreted-text') and elem.attributes['role'] == 'manpage'
-  if is_man_role and man_urls[elem.text] ~= nil then
-    return pandoc.Link(elem, man_urls[elem.text])
-  end
-end

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

@@ -1,29 +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.
-      local role = first.text:match('^{([-._+:%w]+)}$')
-      if role ~= nil then
-        inlines:remove(i)
-        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

@@ -1,114 +0,0 @@
-# Fetchers {#chap-pkgs-fetchers}
-
-When using Nix, you will frequently need to download source code and other files from the internet. For this purpose, Nix provides the [_fixed output derivation_](https://nixos.org/manual/nix/stable/#fixed-output-drvs) feature and Nixpkgs provides various functions that implement the actual fetching from various protocols and services.
-
-## Caveats
-
-Because fixed output derivations are _identified_ by their hash, a common mistake is to update a fetcher's URL or a version parameter, without updating the hash. **This will cause the old contents to be used.** So remember to always invalidate the hash argument.
-
-For those who develop and maintain fetchers, a similar problem arises with changes to the implementation of a fetcher. These may cause a fixed output derivation to fail, but won't normally be caught by tests because the supposed output is already in the store or cache. For the purpose of testing, you can use a trick that is embodied by the [`invalidateFetcherByDrvHash`](#sec-pkgs-invalidateFetcherByDrvHash) function. It uses the derivation `name` to create a unique output path per fetcher implementation, defeating the caching precisely where it would be harmful.
-
-## `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 `sha256`, although many more hash algorithms are supported. Nixpkgs contributors are currently recommended to use `sha256`. 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";
-    sha256 = "1111111111111111111111111111111111111111111111111111";
-  };
-}
-```
-
-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` 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.
-
-Most other fetchers return a directory rather than a single file.
-
-## `fetchsvn` {#fetchsvn}
-
-Used with Subversion. Expects `url` to a Subversion directory, `rev`, and `sha256`.
-
-## `fetchgit` {#fetchgit}
-
-Used with Git. Expects `url` to a Git repo, `rev`, and `sha256`. `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) and [git clone --filter](https://git-scm.com/docs/git-clone#Documentation/git-clone.txt---filterltfilter-specgt) for more infomation:
-
-```nix
-{ stdenv, fetchgit }:
-
-stdenv.mkDerivation {
-  name = "hello";
-  src = fetchgit {
-    url = "https://...";
-    sparseCheckout = ''
-      path/to/be/included
-      another/path
-    '';
-    sha256 = "0000000000000000000000000000000000000000000000000000";
-  };
-}
-```
-
-## `fetchfossil` {#fetchfossil}
-
-Used with Fossil. Expects `url` to a Fossil archive, `rev`, and `sha256`.
-
-## `fetchcvs` {#fetchcvs}
-
-Used with CVS. Expects `cvsRoot`, `tag`, and `sha256`.
-
-## `fetchhg` {#fetchhg}
-
-Used with Mercurial. Expects `url`, `rev`, and `sha256`.
-
-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, `sha256` corresponds to the hash of the extracted directory. Again, other hash algorithms are also available but `sha256` 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, `sha256` corresponds to the hash of the extracted directory. Again, other hash algorithms are also available but `sha256` 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 `sha256`, 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`.

doc/builders/images.xml

@@ -1,12 +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" />
-</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";
-    sha256 = "1blsprpkvm0ws9b96gb36f0rbf8f5jgmw4x6dsb1kswr4ysf591s";
-  };
-  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/dockertools.section.md

@@ -1,314 +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";
-
-  contents = pkgs.redis;
-  runAsRoot = ''
-    #!${pkgs.runtimeShell}
-    mkdir -p /data
-  '';
-
-  config = {
-    Cmd = [ "/bin/redis-server" ];
-    WorkingDir = "/data";
-    Volumes = { "/data" = { }; };
-  };
-}
-```
-
-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.
-
-- `contents` 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).
-
-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";
-  contents = pkgs.hello;
-
-  config.Cmd = [ "/bin/hello" ];
-}
-```
-
-and 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_
-
-: Run-time configuration of the container. A full list of the options are available at 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 = [ "${pkgs.hello}/bin/hello" ];
-}
-```
-
-### Adjusting `maxLayers` {#dockerTools-buildLayeredImage-arg-maxLayers}
-
-Increasing the `maxLayers` increases the number of layers which have a chance to be shared between different images.
-
-Modern Docker installations support up to 128 layers, however older versions support as few as 42.
-
-If the produced image will not be extended by other Docker builds, it is safe to set `maxLayers` to `128`. However it will be impossible to extend the image further.
-
-The first (`maxLayers-2`) most "popular" paths will have their own individual layers, then layer \#`maxLayers-1` will contain all the remaining "unpopular" paths, and finally layer \#`maxLayers` will contain the Image configuration.
-
-Docker's Layers are not inherently ordered, they are content-addressable and are not explicitly layered until they are composed in to an Image.
-
-## streamLayeredImage {#ssec-pkgs-dockerTools-streamLayeredImage}
-
-Builds a script which, when run, will stream an uncompressed tarball of a Docker image to stdout. The arguments to this function are as for `buildLayeredImage`. This method of constructing an image does not realize the image into the Nix store, so it saves on IO and disk/cache space, particularly with large images.
-
-The image produced by running the output script can be piped directly into `docker load`, to load it into the local docker daemon:
-
-```ShellSession
-$(nix-build) | docker load
-```
-
-Alternatively, the image be piped via `gzip` into `skopeo`, e.g. to copy it into a registry:
-
-```ShellSession
-$(nix-build) | gzip --fast | skopeo copy docker-archive:/dev/stdin docker://some_docker_registry/myimage:tag
-```
-
-## pullImage {#ssec-pkgs-dockerTools-fetchFromRegistry}
-
-This function is analogous to the `docker pull` command, in that it can be used to pull a Docker image from a Docker registry. By default [Docker Hub](https://hub.docker.com/) is used to pull images.
-
-Its parameters are described in the example below:
-
-```nix
-pullImage {
-  imageName = "nixos/nix";
-  imageDigest =
-    "sha256:20d9485b25ecfd89204e843a962c1bd70e9cc6858d65d7f5fadc340246e2116b";
-  finalImageName = "nix";
-  finalImageTag = "1.11";
-  sha256 = "0mqjy3zq2v6rrhizgb9nvhczl87lcfphq9601wcprdika2jz7qh8";
-  os = "linux";
-  arch = "x86_64";
-}
-```
-
-- `imageName` specifies the name of the image to be downloaded, which can also include the registry namespace (e.g. `nixos`). This argument is required.
-
-- `imageDigest` specifies the digest of the image to be downloaded. This argument is required.
-
-- `finalImageName`, if specified, this is the name of the image to be created. Note it is never used to fetch the image since we prefer to rely on the immutable digest ID. By default it's equal to `imageName`.
-
-- `finalImageTag`, if specified, this is the tag of the image to be created. Note it is never used to fetch the image since we prefer to rely on the immutable digest ID. By default it's `latest`.
-
-- `sha256` is the checksum of the whole fetched image. This argument is required.
-
-- `os`, if specified, is the operating system of the fetched image. By default it's `linux`.
-
-- `arch`, if specified, is the cpu architecture of the fetched image. By default it's `x86_64`.
-
-`nix-prefetch-docker` command can be used to get required image parameters:
-
-```ShellSession
-$ 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`.
-
-## 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}
-    ${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.

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/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 = "...";
-        sha256 = "...";
-      };
-      # 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.de/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 Selfservice {#sec-citrix-selfservice}
-
-The [selfservice](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://developer-docs.citrix.com/projects/receiver-for-linux-command-reference/en/13.7/), 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";
-          sha256 = "123…";
-        };
-        srcPlugin = fetchurl {
-          url = "http://…/plugins/myplugin1.jar";
-          sha256 = "123…";
-        };
-      });
-      (plugins.buildEclipseUpdateSite {
-        name = "myplugin2-1.0";
-        src = fetchurl {
-          stripRoot = false;
-          url = "http://…/myplugin2.zip";
-          sha256 = "123…";
-        };
-      });
-    ];
-  };
-}
-```

doc/builders/packages/elm.section.md

@@ -1,11 +0,0 @@
-# Elm {#sec-elm}
-
-To start a development environment do
-
-```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 provide 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 presonal 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 this priorities when some package is installed as a dependency. You can override it on 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 varaibles `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 variable are *not set*, then it will attempt to find the files at the default location within _/etc_.

doc/builders/packages/firefox.section.md

@@ -1,52 +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 extension that are available to Firefox. With the help of `fetchFirefoxAddon` this allows build a Firefox version that already comes with addons 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";
-        sha256 = "1h768ljlh3pi23l27qp961v1hd0nbj2vasgy11bmcrlqp40zgvnr";
-      })
-    ];
-
-    extraPolicies = {
-      CaptivePortal = false;
-      DisableFirefoxStudies = true;
-      DisablePocket = true;
-      DisableTelemetry = true;
-      DisableFirefoxAccounts = true;
-      FirefoxHome = {
-        Pocket = false;
-        Snippets = false;
-      };
-       UserMessaging = {
-         ExtensionRecommendations = false;
-         SkipOnboarding = true;
-       };
-    };
-
-    extraPrefs = ''
-      // Show more ssl cert infos
-      lockPref("security.identityblock.show_extended_validation", true);
-    '';
-  };
-}
-```
-
-If `nixExtensions != null` then all manually installed addons 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 addons do not have a valid signature, which is why signature verification is disabled. This does not compromise security because downloaded addons are checksumed and manual addons can't be installed. Also make sure that the `name` field of fetchFirefoxAddon is unique. If you remove an addon from the nixExtensions array, rebuild and start Firefox the removed addon will be completly removed with all of its settings.
-
-## Troubleshooting {#sec-firefox-troubleshooting}
-If addons 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 addons thus nix addons get disabled by the normal Firefox binary.
-
-If addons do not appear installed although they have been defined in your nix configuration file reset the local addon state of your Firefox profile by clicking `help -> restart with addons disabled -> restart -> refresh firefox`. This can happen if you switch from manual addon mode to nix addon mode and then back to manual mode and then again to nix addon 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 initialised 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 uses `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 proejcts 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/documentation.html).
-
-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 an 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 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 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. Similarly for `/usr/bin/python`.
-- We don't have the dynamic loader in `/lib`.
-- The `steam.sh` script in \$HOME can not 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 workarrounds aswell as Steam controller support or other Steam supported controllers such as the DualShock 4 or Nintendo Switch Pr.
-
-## 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 conflics 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/unfree.xml

@@ -1,13 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xml:id="unfree-software">
- <title>Unfree software</title>
-
- <para>
-  All users of Nixpkgs are free software users, and many users (and developers) of Nixpkgs want to limit and tightly control their exposure to unfree software. At the same time, many users need (or want) to run some specific pieces of proprietary software. Nixpkgs includes some expressions for unfree software packages. By default unfree software cannot be installed and doesn’t show up in searches. To allow installing unfree software in a single Nix invocation one can export <literal>NIXPKGS_ALLOW_UNFREE=1</literal>. For a persistent solution, users can set <literal>allowUnfree</literal> in the Nixpkgs configuration.
- </para>
-
- <para>
-  Fine-grained control is possible by defining <literal>allowUnfreePredicate</literal> function in config; it takes the <literal>mkDerivation</literal> parameter attrset and returns <literal>true</literal> for unfree packages that should be allowed.
- </para>
-</section>

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";
-    sha256 = "...";
-  };
-  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/invalidateFetcherByDrvHash.section.xml" />
-</chapter>

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/invalidateFetcherByDrvHash.section.md

@@ -1,31 +0,0 @@
-
-## `invalidateFetcherByDrvHash` {#sec-pkgs-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:
-
-    tests.fetchgit = invalidateFetcherByDrvHash fetchgit {
-      name = "nix-source";
-      url = "https://github.com/NixOS/nix";
-      rev = "9d9dbe6ed05854e03811c361a3380e09183f4f4a";
-      sha256 = "sha256-7DszvbCNTjpzGRmpIVAWXk20P0/XTrWZ79KSOGLrUWY=";
-    };

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/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 roundrip 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 +1,665 @@
+<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>.  TODO: naming of
+  attributes in
+  <filename>all-packages.nix</filename>?</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.  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-pre-r3910"</literal> instead of
+  <literal>"hello-svn-r3910"</literal>, as the latter would be seen as
+  a package named <literal>hello-svn</literal> by
+  <command>nix-env</command>.</para></listitem>
+
+  <listitem><para>If package is fetched from git's commit 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 add <literal>"git"</literal> to the name - e.g.,
+  <literal>"pkgname-git-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
+  (which was convention up to around 2013 and most names
+   still have underscores instead of dashes) — e.g.,
+  <varname>http-parser</varname> instead of
+  <varname>http_parser</varname>.</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 intented
+      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>compiz</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 guidline 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>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>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>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>
+</chapter>

doc/contributing.xml

@@ -0,0 +1,20 @@
+<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. If you make modifications to
+the manual, it's important to build it before committing. You can do that as follows:
+
+<screen>
+$ cd /path/to/nixpkgs
+$ nix-build doc
+</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

@@ -1,665 +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 `name` attribute of the derivation (excluding the version part). 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 `name` attribute `"e2fsprogs-version"`, 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`)
-
-  - **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 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";
-    rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
-    sha256 = "1cw5fszffl5pkpa6s6wjnkiv6lm5k618s32sp60kvmvpy7a2v9kg";
-  }
-  ```
-
-- Better: This is ok, but an archive fetch will still be faster.
-
-  ```nix
-  src = fetchgit {
-    url = "https://github.com/NixOS/nix.git";
-    rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
-    sha256 = "1cw5fszffl5pkpa6s6wjnkiv6lm5k618s32sp60kvmvpy7a2v9kg";
-  }
-  ```
-
-- Best: Fetches a snapshot archive and you get the rev you want.
-
-  ```nix
-  src = fetchFromGitHub {
-    owner = "NixOS";
-    repo = "nix";
-    rev = "1f795f9f44607cc5bec70d1300150bfefcef2aae";
-    sha256 = "1i2yxndxb6yc9l6c99pypbd92lfq5aac4klq7y2v93c9qvx2cgpc";
-  }
-  ```
-
-  Find the value to put as `sha256` by running `nix run -f '<nixpkgs>' nix-prefetch-github -c nix-prefetch-github --rev 1f795f9f44607cc5bec70d1300150bfefcef2aae NixOS nix` or `nix-prefetch-url --unpack https://github.com/NixOS/nix/archive/1f795f9f44607cc5bec70d1300150bfefcef2aae.tar.gz`.
-
-## 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 fake hash in package expression, perform build and extract correct hash from error Nix prints.
-
-    For package updates it is enough to change one symbol to make hash fake. For new packages, you can use `lib.fakeSha256`, `lib.fakeSha512` or any other fake hash.
-
-    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.
-
-::: {.warning}
-This method has security problems. Check below for details.
-:::
-
-### 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 not secure in method 5. When obtaining hashes with fake hash method, TLS checks are disabled. So refetch source hash from several different networks to exclude MITM scenario. Alternatively, use fake hash method to make Nix error, but instead of extracting hash from error, extract `https://` URL and prefetch it with method 1.
-
-## 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";
-    sha256 = "1f0k043rng7f0rfl9hhb89qzvvksqmkrikmm38p61yfx51l325xr";
-  })
-];
-```
-
-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.
-
-```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
-    ```
-
-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`:
-
-- `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 `sha256` argument is changed as well.
-
-## 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;
-  };
-
-  ...
-}
-```

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

@@ -1,106 +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.
-
-Additionally, the following syntax 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}
-  ```
-
-- []{#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/build-aux/pandoc-filters/link-unix-man-references.lua`.
-
-  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.
-
-   - Thunderbird: [`pkgs/applications/networking/mailreaders/thunderbird/default.nix`](https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/networking/mailreaders/thunderbird/default.nix). Lots of dependencies.
-
-   - 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

@@ -1,208 +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
-```
-
-## 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.
-
-<!--
-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

@@ -1,292 +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";
-    sha256 = "0pkpb4837km15zgg6h57bncp66d5lwrlvkr73h0lanywq7zrwhj8";
-  })
-  ```
-
-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. `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 uncommited changes with the `wip` option or specifying a github pull request number.
-
-review changes from pull request number 12345:
-
-```ShellSession
-nix run nixpkgs.nixpkgs-review -c nixpkgs-review pr 12345
-```
-
-review uncommitted changes:
-
-```ShellSession
-nix run nixpkgs.nixpkgs-review -c nixpkgs-review wip
-```
-
-review changes from last commit:
-
-```ShellSession
-nix run nixpkgs.nixpkgs-review -c 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.
-
-
-### 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. 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.
-
-### 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.
-
-### 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/default.nix

@@ -1,39 +1,45 @@
-{ pkgs ? (import ./.. { }), nixpkgs ? { }}:
-let
-  lib = pkgs.lib;
-  doc-support = import ./doc-support { inherit pkgs nixpkgs; };
-in pkgs.stdenv.mkDerivation {
+with import ./.. { };
+with lib;
+
+stdenv.mkDerivation {
   name = "nixpkgs-manual";
 
-  nativeBuildInputs = with pkgs; [
-    pandoc
-    graphviz
-    libxml2
-    libxslt
-    zip
-    jing
-    xmlformat
-  ];
+  sources = sourceFilesBySuffices ./. [".xml"];
 
-  src = lib.cleanSource ./.;
+  buildInputs = [ libxml2 libxslt ];
 
-  postPatch = ''
-    ln -s ${doc-support} ./doc-support/result
+  xsltFlags = ''
+    --param section.autolabel 1
+    --param section.label.includes.component.label 1
+    --param html.stylesheet 'style.css'
+    --param xref.with.number.and.title 1
+    --param toc.section.depth 3
+    --param admon.style '''
+    --param callout.graphics.extension '.gif'
   '';
 
-  installPhase = ''
-    dest="$out/share/doc/nixpkgs"
-    mkdir -p "$(dirname "$dest")"
-    mv out/html "$dest"
-    mv "$dest/index.html" "$dest/manual.html"
+  buildCommand = ''
+    ln -s $sources/*.xml . # */
 
-    mv out/epub/manual.epub "$dest/nixpkgs-manual.epub"
+    echo ${nixpkgsVersion} > .version
 
-    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
+    xmllint --noout --nonet --xinclude --noxincludenode \
+      --relaxng ${docbook5}/xml/rng/docbook/docbook.rng \
+      manual.xml
+
+    dst=$out/share/doc/nixpkgs
+    mkdir -p $dst
+    xsltproc $xsltFlags --nonet --xinclude \
+      --output $dst/manual.html \
+      ${docbook5_xsl}/xml/xsl/docbook/xhtml/docbook.xsl \
+      ./manual.xml
+
+    cp ${./style.css} $dst/style.css
+
+    mkdir -p $dst/images/callouts
+    cp ${docbook5_xsl}/xml/xsl/docbook/images/callouts/*.gif $dst/images/callouts/
+
+    mkdir -p $out/nix-support
+    echo "doc manual $dst manual.html" >> $out/nix-support/hydra-build-products
   '';
-
-  # Environment variables
-  PANDOC_LUA_FILTERS_DIR = "${pkgs.pandoc-lua-filters}/share/pandoc/filters";
 }

doc/doc-support/default.nix

@@ -1,45 +0,0 @@
-{ pkgs ? (import ../.. {}), nixpkgs ? { }}:
-let
-  locationsXml = import ./lib-function-locations.nix { inherit pkgs nixpkgs; };
-  functionDocs = import ./lib-function-docs.nix { inherit locationsXml pkgs; };
-  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>
-  '';
-in pkgs.runCommand "doc-support" {}
-''
-  mkdir result
-  (
-    cd result
-    ln -s ${locationsXml} ./function-locations.xml
-    ln -s ${functionDocs} ./function-docs
-
-    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

@@ -1,27 +0,0 @@
-# Generates the documentation for library functons via nixdoc. To add
-# another library function file to this list, the include list in the
-# file `doc/functions/library.xml` must also be updated.
-
-{ pkgs ? import ./.. {}, locationsXml }:
-
-with pkgs; stdenv.mkDerivation {
-  name = "nixpkgs-lib-docs";
-  src = ./../../lib;
-
-  buildInputs = [ nixdoc ];
-  installPhase = ''
-    function docgen {
-      nixdoc -c "$1" -d "$2" -f "../lib/$1.nix"  > "$out/$1.xml"
-    }
-
-    mkdir -p $out
-    ln -s ${locationsXml} $out/locations.xml
-
-    docgen strings 'String manipulation functions'
-    docgen trivial 'Miscellaneous functions'
-    docgen lists 'List manipulation functions'
-    docgen debug 'Debugging functions'
-    docgen options 'NixOS / nixpkgs option handling'
-    docgen sources 'Source filtering functions'
-  '';
-}

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

@@ -1,85 +0,0 @@
-{ pkgs ? (import ./.. { }), nixpkgs ? { }}:
-let
-  revision = pkgs.lib.trivial.revisionWithDefault (nixpkgs.revision or "master");
-
-  libDefPos = set:
-    builtins.map
-      (name: {
-        name = name;
-        location = builtins.unsafeGetAttrPos name set;
-      })
-      (builtins.attrNames set);
-
-  libset = toplib:
-    builtins.map
-      (subsetname: {
-        subsetname = subsetname;
-        functions = libDefPos toplib.${subsetname};
-      })
-      (builtins.filter
-        (name: builtins.isAttrs toplib.${name})
-        (builtins.attrNames toplib));
-
-  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

@@ -1,14 +0,0 @@
-<?xml version='1.0'?>
-<xsl:stylesheet
-    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
-    version="1.0">
- <xsl:param name="section.autolabel" select="1" />
- <xsl:param name="section.label.includes.component.label" select="1" />
- <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="1" />
- <xsl:param name="use.id.as.filename" 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:stylesheet>

doc/functions.xml

@@ -1,14 +1,273 @@
 <chapter xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="chap-functions">
- <title>Functions reference</title>
- <para>
+	 xmlns:xlink="http://www.w3.org/1999/xlink"
+	 xml:id="chap-functions">
+
+<title>Functions reference</title>
+
+<para>
   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" />
+</para>
+
+<section xml:id="sec-pkgs-overridePackages">
+  <title>pkgs.overridePackages</title>
+
+  <para>
+    This function inside the nixpkgs expression (<varname>pkgs</varname>)
+    can be used to override the set of packages itself.
+  </para>
+  <para>
+    Warning: this function is expensive and must not be used from within
+    the nixpkgs repository.
+  </para>
+  <para>
+    Example usage:
+
+    <programlisting>let
+  pkgs = import &lt;nixpkgs&gt; {};
+  newpkgs = pkgs.overridePackages (self: super: {
+    foo = super.foo.override { ... };
+  };
+in ...</programlisting>
+  </para>
+
+  <para>
+    The resulting <varname>newpkgs</varname> will have the new <varname>foo</varname>
+    expression, and all other expressions depending on <varname>foo</varname> will also
+    use the new <varname>foo</varname> expression.
+  </para>
+
+  <para>
+    The behavior of this function is similar to <link 
+    linkend="sec-modify-via-packageOverrides">config.packageOverrides</link>.
+  </para>
+
+  <para>
+    The <varname>self</varname> parameter refers to the final package set with the
+    applied overrides. Using this parameter may lead to infinite recursion if not
+    used consciously.
+  </para>
+
+  <para>
+    The <varname>super</varname> parameter refers to the old package set.
+    It's equivalent to <varname>pkgs</varname> in the above example.
+  </para>
+
+</section>
+
+<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>pkgs.overridePackages (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-overrideDerivation">
+  <title>&lt;pkg&gt;.overrideDerivation</title>
+
+  <para>
+    The function <varname>overrideDerivation</varname> is usually available for all the
+    derivations in the nixpkgs expression (<varname>pkgs</varname>).
+  </para> 
+  <para>
+    It is used to create a new derivation by overriding the attributes of
+    the original derivation according to the given 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 name, src and patches 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>
+
+</section>
+
+<section xml:id="sec-lib-makeOverridable">
+  <title>lib.makeOverridable</title>
+
+  <para>
+    The function <varname>lib.makeOverridable</varname> is used 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 xml:id="sec-fhs-environments">
+  <title>buildFHSChrootEnv/buildFHSUserEnv</title>
+
+  <para>
+    <function>buildFHSChrootEnv</function> and
+    <function>buildFHSUserEnv</function> provide a way to build and run
+    FHS-compatible lightweight sandboxes. They get their own isolated root with
+    binded <filename>/nix/store</filename>, so their 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.
+  </para>
+
+  <para>
+    <function>buildFHSChrootEnv</function> allows to create persistent
+    environments, which can be constructed, deconstructed and entered by
+    multiple users at once. A downside is that it requires
+    <literal>root</literal> access for both those who create and destroy and
+    those who enter it. It can be useful to create environments for daemons that
+    one can enter and observe.
+  </para>
+
+  <para>
+    <function>buildFHSUserEnv</function> uses Linux namespaces feature to create
+    temporary lightweight environments which are destroyed after all child
+    processes exit. It does not require root access, and can be useful to create
+    sandboxes and wrap applications.
+  </para>
+
+  <para>
+    Those functions both rely on <function>buildFHSEnv</function>, which creates
+    an actual directory structure given a list of necessary packages and extra
+    build commands.
+    <function>buildFHSChrootEnv</function> and <function>buildFHSUserEnv</function>
+    both accept those arguments which are passed to
+    <function>buildFHSEnv</function>:
+  </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).</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).</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>extraBuildCommandsMulti</literal>, but
+    executed only on multilib architectures.</para></listitem>
+    </varlistentry>
+  </variablelist>
+
+  <para>
+    Additionally, <function>buildFHSUserEnv</function> accepts
+    <literal>runScript</literal> parameter, which is a command that would be
+    executed inside the sandbox and passed all the command line arguments. It
+    default to <literal>bash</literal>.
+    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
+    ]) ++ (with [];
+  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>
+
 </chapter>

doc/functions/debug.section.md

@@ -1,5 +0,0 @@
-# Debugging Nix Expressions {#sec-debug}
-
-Nix is a unityped, dynamic language, this means every value can potentially appear anywhere. Since it is also non-strict, evaluation order and what ultimately is evaluated might surprise you. Therefore it is important to be able to debug nix expressions.
-
-In the `lib/debug.nix` file you will find a number of functions that help (pretty-)printing values while evaluation is running. You can even specify how deep these values should be printed recursively, and transform them on the fly. Please consult the docstrings in `lib/debug.nix` for usage information.

doc/functions/generators.section.md

@@ -1,56 +0,0 @@
-# Generators {#sec-generators}
-Generators are functions that create file formats from nix data structures, e. g. for configuration files. There are generators available for: `INI`, `JSON` and `YAML`
-
-All generators follow a similar call interface: `generatorName configFunctions data`, where `configFunctions` is an attrset of user-defined functions that format nested parts of the content. They each have common defaults, so often they do not need to be set manually. An example is `mkSectionName ? (name: libStr.escape [ "[" "]" ] name)` from the `INI` generator. It receives the name of a section and sanitizes it. The default `mkSectionName` escapes `[` and `]` with a backslash.
-
-Generators can be fine-tuned to produce exactly the file format required by your application/service. One example is an INI-file format which uses `: ` as separator, the strings `"yes"`/`"no"` as boolean values and requires all string values to be quoted:
-
-```nix
-with lib;
-let
-  customToINI = generators.toINI {
-    # specifies how to format a key/value pair
-    mkKeyValue = generators.mkKeyValueDefault {
-      # specifies the generated string for a subset of nix values
-      mkValueString = v:
-             if v == true then ''"yes"''
-        else if v == false then ''"no"''
-        else if isString v then ''"${v}"''
-        # and delegats all other values to the default generator
-        else generators.mkValueStringDefault {} v;
-    } ":";
-  };
-
-# the INI file can now be given as plain old nix values
-in customToINI {
-  main = {
-    pushinfo = true;
-    autopush = false;
-    host = "localhost";
-    port = 42;
-  };
-  mergetool = {
-    merge = "diff3";
-  };
-}
-```
-
-This will produce the following INI file as nix string:
-
-```INI
-[main]
-autopush:"no"
-host:"localhost"
-port:42
-pushinfo:"yes"
-str\:ange:"very::strange"
-
-[mergetool]
-merge:"diff3"
-```
-
-::: {.note}
-Nix store paths can be converted to strings by enclosing a derivation attribute like so: `"${drv}"`.
-:::
-
-Detailed documentation for each generator can be found in `lib/generators.nix`.

doc/functions/library.xml

@@ -1,30 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="sec-functions-library">
- <title>Nixpkgs Library Functions</title>
-
- <para>
-  Nixpkgs provides a standard library at <varname>pkgs.lib</varname>, or through <code>import &lt;nixpkgs/lib&gt;</code>.
- </para>
-
- <xi:include href="./library/asserts.xml" />
-
- <xi:include href="./library/attrsets.xml" />
-
-<!-- These docs are generated via nixdoc. To add another generated
-      library function file to this list, the file
-      `lib-function-docs.nix` must also be updated. -->
-
- <xi:include href="./library/generated/strings.xml" />
-
- <xi:include href="./library/generated/trivial.xml" />
-
- <xi:include href="./library/generated/lists.xml" />
-
- <xi:include href="./library/generated/debug.xml" />
-
- <xi:include href="./library/generated/options.xml" />
-
- <xi:include href="./library/generated/sources.xml" />
-</section>

doc/functions/library/asserts.xml

@@ -1,112 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="sec-functions-library-asserts">
- <title>Assert functions</title>
-
- <section xml:id="function-library-lib.asserts.assertMsg">
-  <title><function>lib.asserts.assertMsg</function></title>
-
-  <subtitle><literal>assertMsg :: Bool -> String -> Bool</literal>
-  </subtitle>
-
-  <xi:include href="./locations.xml" xpointer="lib.asserts.assertMsg" />
-
-  <para>
-   Print a trace message if <literal>pred</literal> is false.
-  </para>
-
-  <para>
-   Intended to be used to augment asserts with helpful error messages.
-  </para>
-
-  <variablelist>
-   <varlistentry>
-    <term>
-     <varname>pred</varname>
-    </term>
-    <listitem>
-     <para>
-      Condition under which the <varname>msg</varname> should <emphasis>not</emphasis> be printed.
-     </para>
-    </listitem>
-   </varlistentry>
-   <varlistentry>
-    <term>
-     <varname>msg</varname>
-    </term>
-    <listitem>
-     <para>
-      Message to print.
-     </para>
-    </listitem>
-   </varlistentry>
-  </variablelist>
-
-  <example xml:id="function-library-lib.asserts.assertMsg-example-false">
-   <title>Printing when the predicate is false</title>
-<programlisting><![CDATA[
-assert lib.asserts.assertMsg ("foo" == "bar") "foo is not bar, silly"
-stderr> trace: foo is not bar, silly
-stderr> assert failed
-]]></programlisting>
-  </example>
- </section>
-
- <section xml:id="function-library-lib.asserts.assertOneOf">
-  <title><function>lib.asserts.assertOneOf</function></title>
-
-  <subtitle><literal>assertOneOf :: String -> String ->
-      StringList -> Bool</literal>
-  </subtitle>
-
-  <xi:include href="./locations.xml" xpointer="lib.asserts.assertOneOf" />
-
-  <para>
-   Specialized <function>asserts.assertMsg</function> for checking if <varname>val</varname> is one of the elements of <varname>xs</varname>. Useful for checking enums.
-  </para>
-
-  <variablelist>
-   <varlistentry>
-    <term>
-     <varname>name</varname>
-    </term>
-    <listitem>
-     <para>
-      The name of the variable the user entered <varname>val</varname> into, for inclusion in the error message.
-     </para>
-    </listitem>
-   </varlistentry>
-   <varlistentry>
-    <term>
-     <varname>val</varname>
-    </term>
-    <listitem>
-     <para>
-      The value of what the user provided, to be compared against the values in <varname>xs</varname>.
-     </para>
-    </listitem>
-   </varlistentry>
-   <varlistentry>
-    <term>
-     <varname>xs</varname>
-    </term>
-    <listitem>
-     <para>
-      The list of valid values.
-     </para>
-    </listitem>
-   </varlistentry>
-  </variablelist>
-
-  <example xml:id="function-library-lib.asserts.assertOneOf-example">
-   <title>Ensuring a user provided a possible value</title>
-<programlisting><![CDATA[
-let sslLibrary = "bearssl";
-in lib.asserts.assertOneOf "sslLibrary" sslLibrary [ "openssl" "libressl" ];
-=> false
-stderr> trace: sslLibrary must be one of "openssl", "libressl", but is: "bearssl"
-        ]]></programlisting>
-  </example>
- </section>
-</section>

doc/functions/nix-gitignore.section.md

@@ -1,49 +0,0 @@
-# pkgs.nix-gitignore {#sec-pkgs-nix-gitignore}
-
-`pkgs.nix-gitignore` is a function that acts similarly to `builtins.filterSource` but also allows filtering with the help of the gitignore format.
-
-## Usage {#sec-pkgs-nix-gitignore-usage}
-
-`pkgs.nix-gitignore` exports a number of functions, but you\'ll most likely need either `gitignoreSource` or `gitignoreSourcePure`. As their first argument, they both accept either 1. a file with gitignore lines or 2. a string with gitignore lines, or 3. a list of either of the two. They will be concatenated into a single big string.
-
-```nix
-{ pkgs ? import <nixpkgs> {} }:
-
- nix-gitignore.gitignoreSource [] ./source
-     # Simplest version
-
- nix-gitignore.gitignoreSource "supplemental-ignores\n" ./source
-     # This one reads the ./source/.gitignore and concats the auxiliary ignores
-
- nix-gitignore.gitignoreSourcePure "ignore-this\nignore-that\n" ./source
-     # Use this string as gitignore, don't read ./source/.gitignore.
-
- nix-gitignore.gitignoreSourcePure ["ignore-this\nignore-that\n", ~/.gitignore] ./source
-     # It also accepts a list (of strings and paths) that will be concatenated
-     # once the paths are turned to strings via readFile.
-```
-
-These functions are derived from the `Filter` functions by setting the first filter argument to `(_: _: true)`:
-
-```nix
-gitignoreSourcePure = gitignoreFilterSourcePure (_: _: true);
-gitignoreSource = gitignoreFilterSource (_: _: true);
-```
-
-Those filter functions accept the same arguments the `builtins.filterSource` function would pass to its filters, thus `fn: gitignoreFilterSourcePure fn ""` should be extensionally equivalent to `filterSource`. The file is blacklisted if it\'s blacklisted by either your filter or the gitignoreFilter.
-
-If you want to make your own filter from scratch, you may use
-
-```nix
-gitignoreFilter = ign: root: filterPattern (gitignoreToPatterns ign) root;
-```
-
-## gitignore files in subdirectories {#sec-pkgs-nix-gitignore-usage-recursive}
-
-If you wish to use a filter that would search for .gitignore files in subdirectories, just like git does by default, use this function:
-
-```nix
-gitignoreFilterRecursiveSource = filter: patterns: root:
-# OR
-gitignoreRecursiveSource = gitignoreFilterSourcePure (_: _: true);
-```

doc/functions/prefer-remote-fetch.section.md

@@ -1,17 +0,0 @@
-# prefer-remote-fetch overlay {#sec-prefer-remote-fetch}
-
-`prefer-remote-fetch` is an overlay that download sources on remote builder. This is useful when the evaluating machine has a slow upload while the builder can fetch faster directly from the source. To use it, put the following snippet as a new overlay:
-
-```nix
-self: super:
-  (super.prefer-remote-fetch self super)
-```
-
-A full configuration example for that sets the overlay up for your own account, could look like this
-
-```ShellSession
-$ mkdir ~/.config/nixpkgs/overlays/
-$ cat > ~/.config/nixpkgs/overlays/prefer-remote-fetch.nix <<EOF
-  self: super: super.prefer-remote-fetch self super
-EOF
-```

doc/haskell-users-guide.xml

@@ -0,0 +1,912 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="users-guide-to-the-haskell-infrastructure">
+
+<title>User's Guide to the Haskell Infrastructure</title>
+
+<section xml:id="how-to-install-haskell-packages">
+  <title>How to install Haskell packages</title>
+  <para>
+    Nixpkgs distributes build instructions for all Haskell packages
+    registered on
+    <link xlink:href="http://hackage.haskell.org/">Hackage</link>, but
+    strangely enough normal Nix package lookups don't seem to discover
+    any of them, except for the default version of ghc, cabal-install, and stack:
+  </para>
+  <programlisting>
+$ nix-env -i alex
+error: selector ‘alex’ matches no derivations
+$ nix-env -qa ghc
+ghc-7.10.2
+</programlisting>
+  <para>
+    The Haskell package set is not registered in the top-level namespace
+    because it is <emphasis>huge</emphasis>. If all Haskell packages
+    were visible to these commands, then name-based search/install
+    operations would be much slower than they are now. We avoided that
+    by keeping all Haskell-related packages in a separate attribute set
+    called <literal>haskellPackages</literal>, which the following
+    command will list:
+  </para>
+  <programlisting>
+$ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -qaP -A haskellPackages
+haskellPackages.a50         a50-0.5
+haskellPackages.abacate     haskell-abacate-0.0.0.0
+haskellPackages.abcBridge   haskell-abcBridge-0.12
+haskellPackages.afv         afv-0.1.1
+haskellPackages.alex        alex-3.1.4
+haskellPackages.Allure      Allure-0.4.101.1
+haskellPackages.alms        alms-0.6.7
+[... some 8000 entries omitted  ...]
+</programlisting>
+  <para>
+    To install any of those packages into your profile, refer to them by
+    their attribute path (first column):
+  </para>
+  <programlisting>
+$ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA haskellPackages.Allure ...
+</programlisting>
+  <para>
+    The attribute path of any Haskell packages corresponds to the name
+    of that particular package on Hackage: the package
+    <literal>cabal-install</literal> has the attribute
+    <literal>haskellPackages.cabal-install</literal>, and so on.
+    (Actually, this convention causes trouble with packages like
+    <literal>3dmodels</literal> and <literal>4Blocks</literal>, because
+    these names are invalid identifiers in the Nix language. The issue
+    of how to deal with these rare corner cases is currently
+    unresolved.)
+  </para>
+  <para>
+    Haskell packages who's Nix name (second column) begins with a
+    <literal>haskell-</literal> prefix are packages that provide a
+    library whereas packages without that prefix provide just
+    executables. Libraries may provide executables too, though: the
+    package <literal>haskell-pandoc</literal>, for example, installs
+    both a library and an application. You can install and use Haskell
+    executables just like any other program in Nixpkgs, but using
+    Haskell libraries for development is a bit trickier and we'll
+    address that subject in great detail in section
+    <link linkend="how-to-create-a-development-environment">How to
+    create a development environment</link>.
+  </para>
+  <para>
+    Attribute paths are deterministic inside of Nixpkgs, but the path
+    necessary to reach Nixpkgs varies from system to system. We dodged
+    that problem by giving <literal>nix-env</literal> an explicit
+    <literal>-f &quot;&lt;nixpkgs&gt;&quot;</literal> parameter, but if
+    you call <literal>nix-env</literal> without that flag, then chances
+    are the invocation fails:
+  </para>
+  <programlisting>
+$ nix-env -iA haskellPackages.cabal-install
+error: attribute ‘haskellPackages’ in selection path
+       ‘haskellPackages.cabal-install’ not found
+</programlisting>
+  <para>
+    On NixOS, for example, Nixpkgs does <emphasis>not</emphasis> exist
+    in the top-level namespace by default. To figure out the proper
+    attribute path, it's easiest to query for the path of a well-known
+    Nixpkgs package, i.e.:
+  </para>
+  <programlisting>
+$ nix-env -qaP coreutils
+nixos.coreutils  coreutils-8.23
+</programlisting>
+  <para>
+    If your system responds like that (most NixOS installations will),
+    then the attribute path to <literal>haskellPackages</literal> is
+    <literal>nixos.haskellPackages</literal>. Thus, if you want to
+    use <literal>nix-env</literal> without giving an explicit
+    <literal>-f</literal> flag, then that's the way to do it:
+  </para>
+  <programlisting>
+$ nix-env -qaP -A nixos.haskellPackages
+$ nix-env -iA nixos.haskellPackages.cabal-install
+</programlisting>
+  <para>
+    Our current default compiler is GHC 7.10.x and the
+    <literal>haskellPackages</literal> set contains packages built with
+    that particular version. Nixpkgs contains the latest major release
+    of every GHC since 6.10.4, however, and there is a whole family of
+    package sets available that defines Hackage packages built with each
+    of those compilers, too:
+  </para>
+  <programlisting>
+$ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -qaP -A haskell.packages.ghc6123
+$ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -qaP -A haskell.packages.ghc763
+</programlisting>
+  <para>
+    The name <literal>haskellPackages</literal> is really just a synonym
+    for <literal>haskell.packages.ghc7102</literal>, because we prefer
+    that package set internally and recommend it to our users as their
+    default choice, but ultimately you are free to compile your Haskell
+    packages with any GHC version you please. The following command
+    displays the complete list of available compilers:
+  </para>
+  <programlisting>
+$ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -qaP -A haskell.compiler
+haskell.compiler.ghc6104        ghc-6.10.4
+haskell.compiler.ghc6123        ghc-6.12.3
+haskell.compiler.ghc704         ghc-7.0.4
+haskell.compiler.ghc722         ghc-7.2.2
+haskell.compiler.ghc742         ghc-7.4.2
+haskell.compiler.ghc763         ghc-7.6.3
+haskell.compiler.ghc784         ghc-7.8.4
+haskell.compiler.ghc7102        ghc-7.10.2
+haskell.compiler.ghcHEAD        ghc-7.11.20150402
+haskell.compiler.ghcNokinds     ghc-nokinds-7.11.20150704
+haskell.compiler.ghcjs          ghcjs-0.1.0
+haskell.compiler.jhc            jhc-0.8.2
+haskell.compiler.uhc            uhc-1.1.9.0
+</programlisting>
+  <para>
+    We have no package sets for <literal>jhc</literal> or
+    <literal>uhc</literal> yet, unfortunately, but for every version of
+    GHC listed above, there exists a package set based on that compiler.
+    Also, the attributes <literal>haskell.compiler.ghcXYC</literal> and
+    <literal>haskell.packages.ghcXYC.ghc</literal> are synonymous for
+    the sake of convenience.
+  </para>
+</section>
+<section xml:id="how-to-create-a-development-environment">
+  <title>How to create a development environment</title>
+  <section xml:id="how-to-install-a-compiler">
+    <title>How to install a compiler</title>
+    <para>
+      A simple development environment consists of a Haskell compiler
+      and the tool <literal>cabal-install</literal>, and we saw in
+      section <link linkend="how-to-install-haskell-packages">How to
+      install Haskell packages</link> how you can install those programs
+      into your user profile:
+    </para>
+    <programlisting>
+$ nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA haskellPackages.ghc haskellPackages.cabal-install
+</programlisting>
+    <para>
+      Instead of the default package set
+      <literal>haskellPackages</literal>, you can also use the more
+      precise name <literal>haskell.compiler.ghc7102</literal>, which
+      has the advantage that it refers to the same GHC version
+      regardless of what Nixpkgs considers &quot;default&quot; at any
+      given time.
+    </para>
+    <para>
+      Once you've made those tools available in
+      <literal>$PATH</literal>, it's possible to build Hackage packages
+      the same way people without access to Nix do it all the time:
+    </para>
+    <programlisting>
+$ cabal get lens-4.11 &amp;&amp; cd lens-4.11
+$ cabal install -j --dependencies-only
+$ cabal configure
+$ cabal build
+</programlisting>
+    <para>
+      If you enjoy working with Cabal sandboxes, then that's entirely
+      possible too: just execute the command
+    </para>
+    <programlisting>
+$ cabal sandbox init
+</programlisting>
+    <para>
+      before installing the required dependencies.
+    </para>
+    <para>
+      The <literal>nix-shell</literal> utility makes it easy to switch
+      to a different compiler version; just enter the Nix shell
+      environment with the command
+    </para>
+    <programlisting>
+$ nix-shell -p haskell.compiler.ghc784
+</programlisting>
+    <para>
+      to bring GHC 7.8.4 into <literal>$PATH</literal>. Re-running
+      <literal>cabal configure</literal> switches your build to use that
+      compiler instead. If you're working on a project that doesn't
+      depend on any additional system libraries outside of GHC, then
+      it's sufficient even to run the <literal>cabal configure</literal>
+      command inside of the shell:
+    </para>
+    <programlisting>
+$ nix-shell -p haskell.compiler.ghc784 --command &quot;cabal configure&quot;
+</programlisting>
+    <para>
+      Afterwards, all other commands like <literal>cabal build</literal>
+      work just fine in any shell environment, because the configure
+      phase recorded the absolute paths to all required tools like GHC
+      in its build configuration inside of the <literal>dist/</literal>
+      directory. Please note, however, that
+      <literal>nix-collect-garbage</literal> can break such an
+      environment because the Nix store paths created by
+      <literal>nix-shell</literal> aren't &quot;alive&quot; anymore once
+      <literal>nix-shell</literal> has terminated. If you find that your
+      Haskell builds no longer work after garbage collection, then
+      you'll have to re-run <literal>cabal configure</literal> inside of
+      a new <literal>nix-shell</literal> environment.
+    </para>
+  </section>
+  <section xml:id="how-to-install-a-compiler-with-libraries">
+    <title>How to install a compiler with libraries</title>
+    <para>
+      GHC expects to find all installed libraries inside of its own
+      <literal>lib</literal> directory. This approach works fine on
+      traditional Unix systems, but it doesn't work for Nix, because
+      GHC's store path is immutable once it's built. We cannot install
+      additional libraries into that location. As a consequence, our
+      copies of GHC don't know any packages except their own core
+      libraries, like <literal>base</literal>,
+      <literal>containers</literal>, <literal>Cabal</literal>, etc.
+    </para>
+    <para>
+      We can register additional libraries to GHC, however, using a
+      special build function called <literal>ghcWithPackages</literal>.
+      That function expects one argument: a function that maps from an
+      attribute set of Haskell packages to a list of packages, which
+      determines the libraries known to that particular version of GHC.
+      For example, the Nix expression
+      <literal>ghcWithPackages (pkgs: [pkgs.mtl])</literal> generates a
+      copy of GHC that has the <literal>mtl</literal> library registered
+      in addition to its normal core packages:
+    </para>
+    <programlisting>
+$ nix-shell -p &quot;haskellPackages.ghcWithPackages (pkgs: [pkgs.mtl])&quot;
+
+[nix-shell:~]$ ghc-pkg list mtl
+/nix/store/zy79...-ghc-7.10.2/lib/ghc-7.10.2/package.conf.d:
+    mtl-2.2.1
+</programlisting>
+    <para>
+      This function allows users to define their own development
+      environment by means of an override. After adding the following
+      snippet to <literal>~/.nixpkgs/config.nix</literal>,
+    </para>
+    <programlisting>
+{
+  packageOverrides = super: let self = super.pkgs; in
+  {
+    myHaskellEnv = self.haskell.packages.ghc7102.ghcWithPackages
+                     (haskellPackages: with haskellPackages; [
+                       # libraries
+                       arrows async cgi criterion
+                       # tools
+                       cabal-install haskintex
+                     ]);
+  };
+}
+</programlisting>
+    <para>
+      it's possible to install that compiler with
+      <literal>nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA myHaskellEnv</literal>.
+      If you'd like to switch that development environment to a
+      different version of GHC, just replace the
+      <literal>ghc7102</literal> bit in the previous definition with the
+      appropriate name. Of course, it's also possible to define any
+      number of these development environments! (You can't install two
+      of them into the same profile at the same time, though, because
+      that would result in file conflicts.)
+    </para>
+    <para>
+      The generated <literal>ghc</literal> program is a wrapper script
+      that re-directs the real GHC executable to use a new
+      <literal>lib</literal> directory --- one that we specifically
+      constructed to contain all those packages the user requested:
+    </para>
+    <programlisting>
+$ cat $(type -p ghc)
+#! /nix/store/xlxj...-bash-4.3-p33/bin/bash -e
+export NIX_GHC=/nix/store/19sm...-ghc-7.10.2/bin/ghc
+export NIX_GHCPKG=/nix/store/19sm...-ghc-7.10.2/bin/ghc-pkg
+export NIX_GHC_DOCDIR=/nix/store/19sm...-ghc-7.10.2/share/doc/ghc/html
+export NIX_GHC_LIBDIR=/nix/store/19sm...-ghc-7.10.2/lib/ghc-7.10.2
+exec /nix/store/j50p...-ghc-7.10.2/bin/ghc &quot;-B$NIX_GHC_LIBDIR&quot; &quot;$@&quot;
+</programlisting>
+    <para>
+      The variables <literal>$NIX_GHC</literal>,
+      <literal>$NIX_GHCPKG</literal>, etc. point to the
+      <emphasis>new</emphasis> store path
+      <literal>ghcWithPackages</literal> constructed specifically for
+      this environment. The last line of the wrapper script then
+      executes the real <literal>ghc</literal>, but passes the path to
+      the new <literal>lib</literal> directory using GHC's
+      <literal>-B</literal> flag.
+    </para>
+    <para>
+      The purpose of those environment variables is to work around an
+      impurity in the popular
+      <link xlink:href="http://hackage.haskell.org/package/ghc-paths">ghc-paths</link>
+      library. That library promises to give its users access to GHC's
+      installation paths. Only, the library can't possible know that
+      path when it's compiled, because the path GHC considers its own is
+      determined only much later, when the user configures it through
+      <literal>ghcWithPackages</literal>. So we
+      <link xlink:href="https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/haskell-modules/ghc-paths-nix.patch">patched
+      ghc-paths</link> to return the paths found in those environment
+      variables at run-time rather than trying to guess them at
+      compile-time.
+    </para>
+    <para>
+      To make sure that mechanism works properly all the time, we
+      recommend that you set those variables to meaningful values in
+      your shell environment, too, i.e. by adding the following code to
+      your <literal>~/.bashrc</literal>:
+    </para>
+    <programlisting>
+if type &gt;/dev/null 2&gt;&amp;1 -p ghc; then
+  eval &quot;$(egrep ^export &quot;$(type -p ghc)&quot;)&quot;
+fi
+</programlisting>
+    <para>
+      If you are certain that you'll use only one GHC environment which
+      is located in your user profile, then you can use the following
+      code, too, which has the advantage that it doesn't contain any
+      paths from the Nix store, i.e. those settings always remain valid
+      even if a <literal>nix-env -u</literal> operation updates the GHC
+      environment in your profile:
+    </para>
+    <programlisting>
+if [ -e ~/.nix-profile/bin/ghc ]; then
+  export NIX_GHC=&quot;$HOME/.nix-profile/bin/ghc&quot;
+  export NIX_GHCPKG=&quot;$HOME/.nix-profile/bin/ghc-pkg&quot;
+  export NIX_GHC_DOCDIR=&quot;$HOME/.nix-profile/share/doc/ghc/html&quot;
+  export NIX_GHC_LIBDIR=&quot;$HOME/.nix-profile/lib/ghc-$($NIX_GHC --numeric-version)&quot;
+fi
+</programlisting>
+  </section>
+  <section xml:id="how-to-install-a-compiler-with-indexes">
+    <title>How to install a compiler with libraries, hoogle and documentation indexes</title>
+    <para>
+      If you plan to use your environment for interactive programming,
+      not just compiling random Haskell code, you might want to
+      replace <literal>ghcWithPackages</literal> in all the listings
+      above with <literal>ghcWithHoogle</literal>.
+    </para>
+    <para>
+      This environment generator not only produces an environment with
+      GHC and all the specified libraries, but also generates a
+      <literal>hoogle</literal> and <literal>haddock</literal> indexes
+      for all the packages, and provides a wrapper script around
+      <literal>hoogle</literal> binary that uses all those things. A
+      precise name for this thing would be
+      "<literal>ghcWithPackagesAndHoogleAndDocumentationIndexes</literal>",
+      which is, regrettably, too long and scary.
+    </para>
+    <para>
+      For example, installing the following environment
+    </para>
+    <programlisting>
+{
+  packageOverrides = super: let self = super.pkgs; in
+  {
+    myHaskellEnv = self.haskellPackages.ghcWithHoogle
+                     (haskellPackages: with haskellPackages; [
+                       # libraries
+                       arrows async cgi criterion
+                       # tools
+                       cabal-install haskintex
+                     ]);
+  };
+}
+</programlisting>
+    <para>
+      allows one to browse module documentation index <link
+      xlink:href="https://downloads.haskell.org/~ghc/latest/docs/html/libraries/index.html">not
+      too dissimilar to this</link> for all the specified packages and
+      their dependencies by directing a browser of choice to
+      <literal>~/.nix-profiles/share/doc/hoogle/index.html</literal>
+      (or
+      <literal>/run/current-system/sw/share/doc/hoogle/index.html</literal>
+      in case you put it in
+      <literal>environment.systemPackages</literal> in NixOS).
+    </para>
+    <para>
+      After you've marveled enough at that try adding the following to
+      your <literal>~/.ghc/ghci.conf</literal>
+    </para>
+    <programlisting>
+:def hoogle \s -> return $ ":! hoogle search -cl --count=15 \"" ++ s ++ "\""
+:def doc \s -> return $ ":! hoogle search -cl --info \"" ++ s ++ "\""
+</programlisting>
+    <para>
+      and test it by typing into <literal>ghci</literal>:
+    </para>
+    <programlisting>
+:hoogle a -> a
+:doc a -> a
+</programlisting>
+    <para>
+      Be sure to note the links to <literal>haddock</literal> files in
+      the output. With any modern and properly configured terminal
+      emulator you can just click those links to navigate there.
+    </para>
+    <para>
+      Finally, you can run
+    </para>
+    <programlisting>
+hoogle server -p 8080
+</programlisting>
+    <para>
+      and navigate to <link xlink:href="http://localhost:8080/"/> for
+      your own local <link
+      xlink:href="https://www.haskell.org/hoogle/">Hoogle</link>.
+      Note, however, that Firefox and possibly other browsers disallow
+      navigation from <literal>http:</literal> to
+      <literal>file:</literal> URIs for security reasons, which might
+      be quite an inconvenience. See <link
+      xlink:href="http://kb.mozillazine.org/Links_to_local_pages_do_not_work">this
+      page</link> for workarounds.
+    </para>
+  </section>
+  <section xml:id="how-to-create-ad-hoc-environments-for-nix-shell">
+    <title>How to create ad hoc environments for
+    <literal>nix-shell</literal></title>
+    <para>
+      The easiest way to create an ad hoc development environment is to
+      run <literal>nix-shell</literal> with the appropriate GHC
+      environment given on the command-line:
+    </para>
+    <programlisting>
+nix-shell -p &quot;haskellPackages.ghcWithPackages (pkgs: with pkgs; [mtl pandoc])&quot;
+</programlisting>
+    <para>
+      For more sophisticated use-cases, however, it's more convenient to
+      save the desired configuration in a file called
+      <literal>shell.nix</literal> that looks like this:
+    </para>
+    <programlisting>
+{ nixpkgs ? import &lt;nixpkgs&gt; {}, compiler ? &quot;ghc7102&quot; }:
+let
+  inherit (nixpkgs) pkgs;
+  ghc = pkgs.haskell.packages.${compiler}.ghcWithPackages (ps: with ps; [
+          monad-par mtl
+        ]);
+in
+pkgs.stdenv.mkDerivation {
+  name = &quot;my-haskell-env-0&quot;;
+  buildInputs = [ ghc ];
+  shellHook = &quot;eval $(egrep ^export ${ghc}/bin/ghc)&quot;;
+}
+</programlisting>
+    <para>
+      Now run <literal>nix-shell</literal> --- or even
+      <literal>nix-shell --pure</literal> --- to enter a shell
+      environment that has the appropriate compiler in
+      <literal>$PATH</literal>. If you use <literal>--pure</literal>,
+      then add all other packages that your development environment
+      needs into the <literal>buildInputs</literal> attribute. If you'd
+      like to switch to a different compiler version, then pass an
+      appropriate <literal>compiler</literal> argument to the
+      expression, i.e.
+      <literal>nix-shell --argstr compiler ghc784</literal>.
+    </para>
+    <para>
+      If you need such an environment because you'd like to compile a
+      Hackage package outside of Nix --- i.e. because you're hacking on
+      the latest version from Git ---, then the package set provides
+      suitable nix-shell environments for you already! Every Haskell
+      package has an <literal>env</literal> attribute that provides a
+      shell environment suitable for compiling that particular package.
+      If you'd like to hack the <literal>lens</literal> library, for
+      example, then you just have to check out the source code and enter
+      the appropriate environment:
+    </para>
+    <programlisting>
+  $ cabal get lens-4.11 &amp;&amp; cd lens-4.11
+  Downloading lens-4.11...
+  Unpacking to lens-4.11/
+
+  $ nix-shell &quot;&lt;nixpkgs&gt;&quot; -A haskellPackages.lens.env
+  [nix-shell:/tmp/lens-4.11]$
+</programlisting>
+    <para>
+      At point, you can run <literal>cabal configure</literal>,
+      <literal>cabal build</literal>, and all the other development
+      commands. Note that you need <literal>cabal-install</literal>
+      installed in your <literal>$PATH</literal> already to use it here
+      --- the <literal>nix-shell</literal> environment does not provide
+      it.
+    </para>
+  </section>
+</section>
+<section xml:id="how-to-create-nix-builds-for-your-own-private-haskell-packages">
+  <title>How to create Nix builds for your own private Haskell
+  packages</title>
+  <para>
+    If your own Haskell packages have build instructions for Cabal, then
+    you can convert those automatically into build instructions for Nix
+    using the <literal>cabal2nix</literal> utility, which you can
+    install into your profile by running
+    <literal>nix-env -i cabal2nix</literal>.
+  </para>
+  <section xml:id="how-to-build-a-stand-alone-project">
+    <title>How to build a stand-alone project</title>
+    <para>
+      For example, let's assume that you're working on a private project
+      called <literal>foo</literal>. To generate a Nix build expression
+      for it, change into the project's top-level directory and run the
+      command:
+    </para>
+    <programlisting>
+$ cabal2nix . &gt;foo.nix
+</programlisting>
+    <para>
+      Then write the following snippet into a file called
+      <literal>default.nix</literal>:
+    </para>
+    <programlisting>
+{ nixpkgs ? import &lt;nixpkgs&gt; {}, compiler ? &quot;ghc7102&quot; }:
+nixpkgs.pkgs.haskell.packages.${compiler}.callPackage ./foo.nix { }
+</programlisting>
+    <para>
+      Finally, store the following code in a file called
+      <literal>shell.nix</literal>:
+    </para>
+    <programlisting>
+{ nixpkgs ? import &lt;nixpkgs&gt; {}, compiler ? &quot;ghc7102&quot; }:
+(import ./default.nix { inherit nixpkgs compiler; }).env
+</programlisting>
+    <para>
+      At this point, you can run <literal>nix-build</literal> to have
+      Nix compile your project and install it into a Nix store path. The
+      local directory will contain a symlink called
+      <literal>result</literal> after <literal>nix-build</literal>
+      returns that points into that location. Of course, passing the
+      flag <literal>--argstr compiler ghc763</literal> allows switching
+      the build to any version of GHC currently supported.
+    </para>
+    <para>
+      Furthermore, you can call <literal>nix-shell</literal> to enter an
+      interactive development environment in which you can use
+      <literal>cabal configure</literal> and
+      <literal>cabal build</literal> to develop your code. That
+      environment will automatically contain a proper GHC derivation
+      with all the required libraries registered as well as all the
+      system-level libraries your package might need.
+    </para>
+    <para>
+      If your package does not depend on any system-level libraries,
+      then it's sufficient to run
+    </para>
+    <programlisting>
+$ nix-shell --command &quot;cabal configure&quot;
+</programlisting>
+    <para>
+      once to set up your build. <literal>cabal-install</literal>
+      determines the absolute paths to all resources required for the
+      build and writes them into a config file in the
+      <literal>dist/</literal> directory. Once that's done, you can run
+      <literal>cabal build</literal> and any other command for that
+      project even outside of the <literal>nix-shell</literal>
+      environment. This feature is particularly nice for those of us who
+      like to edit their code with an IDE, like Emacs'
+      <literal>haskell-mode</literal>, because it's not necessary to
+      start Emacs inside of nix-shell just to make it find out the
+      necessary settings for building the project;
+      <literal>cabal-install</literal> has already done that for us.
+    </para>
+    <para>
+      If you want to do some quick-and-dirty hacking and don't want to
+      bother setting up a <literal>default.nix</literal> and
+      <literal>shell.nix</literal> file manually, then you can use the
+      <literal>--shell</literal> flag offered by
+      <literal>cabal2nix</literal> to have it generate a stand-alone
+      <literal>nix-shell</literal> environment for you. With that
+      feature, running
+    </para>
+    <programlisting>
+$ cabal2nix --shell . &gt;shell.nix
+$ nix-shell --command &quot;cabal configure&quot;
+</programlisting>
+    <para>
+      is usually enough to set up a build environment for any given
+      Haskell package. You can even use that generated file to run
+      <literal>nix-build</literal>, too:
+    </para>
+    <programlisting>
+$ nix-build shell.nix
+</programlisting>
+  </section>
+  <section xml:id="how-to-build-projects-that-depend-on-each-other">
+    <title>How to build projects that depend on each other</title>
+    <para>
+      If you have multiple private Haskell packages that depend on each
+      other, then you'll have to register those packages in the Nixpkgs
+      set to make them visible for the dependency resolution performed
+      by <literal>callPackage</literal>. First of all, change into each
+      of your projects top-level directories and generate a
+      <literal>default.nix</literal> file with
+      <literal>cabal2nix</literal>:
+    </para>
+    <programlisting>
+$ cd ~/src/foo &amp;&amp; cabal2nix . &gt;default.nix
+$ cd ~/src/bar &amp;&amp; cabal2nix . &gt;default.nix
+</programlisting>
+    <para>
+      Then edit your <literal>~/.nixpkgs/config.nix</literal> file to
+      register those builds in the default Haskell package set:
+    </para>
+    <programlisting>
+  {
+    packageOverrides = super: let self = super.pkgs; in
+    {
+      haskellPackages = super.haskellPackages.override {
+        overrides = self: super: {
+          foo = self.callPackage ../src/foo {};
+          bar = self.callPackage ../src/bar {};
+        };
+      };
+    };
+  }
+</programlisting>
+    <para>
+      Once that's accomplished,
+      <literal>nix-env -f &quot;&lt;nixpkgs&gt;&quot; -qA haskellPackages</literal>
+      will show your packages like any other package from Hackage, and
+      you can build them
+    </para>
+    <programlisting>
+$ nix-build &quot;&lt;nixpkgs&gt;&quot; -A haskellPackages.foo
+</programlisting>
+    <para>
+      or enter an interactive shell environment suitable for building
+      them:
+    </para>
+    <programlisting>
+$ nix-shell &quot;&lt;nixpkgs&gt;&quot; -A haskellPackages.bar.env
+</programlisting>
+  </section>
+</section>
+<section xml:id="miscellaneous-topics">
+  <title>Miscellaneous Topics</title>
+  <section xml:id="how-to-build-with-profiling-enabled">
+    <title>How to build with profiling enabled</title>
+    <para>
+      Every Haskell package set takes a function called
+      <literal>overrides</literal> that you can use to manipulate the
+      package as much as you please. One useful application of this
+      feature is to replace the default <literal>mkDerivation</literal>
+      function with one that enables library profiling for all packages.
+      To accomplish that, add configure the following snippet in your
+      <literal>~/.nixpkgs/config.nix</literal> file:
+    </para>
+    <programlisting>
+{
+  packageOverrides = super: let self = super.pkgs; in
+  {
+    profiledHaskellPackages = self.haskellPackages.override {
+      overrides = self: super: {
+        mkDerivation = args: super.mkDerivation (args // {
+          enableLibraryProfiling = true;
+        });
+      };
+    };
+  };
+}
+</programlisting>
+    <para>
+        Then, replace instances of <literal>haskellPackages</literal> in the
+        <literal>cabal2nix</literal>-generated <literal>default.nix</literal>
+        or <literal>shell.nix</literal> files with
+        <literal>profiledHaskellPackages</literal>.
+    </para>
+  </section>
+  <section xml:id="how-to-override-package-versions-in-a-compiler-specific-package-set">
+    <title>How to override package versions in a compiler-specific
+    package set</title>
+    <para>
+      Nixpkgs provides the latest version of
+      <link xlink:href="http://hackage.haskell.org/package/ghc-events"><literal>ghc-events</literal></link>,
+      which is 0.4.4.0 at the time of this writing. This is fine for
+      users of GHC 7.10.x, but GHC 7.8.4 cannot compile that binary.
+      Now, one way to solve that problem is to register an older version
+      of <literal>ghc-events</literal> in the 7.8.x-specific package
+      set. The first step is to generate Nix build instructions with
+      <literal>cabal2nix</literal>:
+    </para>
+    <programlisting>
+$ cabal2nix cabal://ghc-events-0.4.3.0 &gt;~/.nixpkgs/ghc-events-0.4.3.0.nix
+</programlisting>
+    <para>
+      Then add the override in <literal>~/.nixpkgs/config.nix</literal>:
+    </para>
+    <programlisting>
+{
+  packageOverrides = super: let self = super.pkgs; in
+  {
+    haskell = super.haskell // {
+      packages = super.haskell.packages // {
+        ghc784 = super.haskell.packages.ghc784.override {
+          overrides = self: super: {
+            ghc-events = self.callPackage ./ghc-events-0.4.3.0.nix {};
+          };
+        };
+      };
+    };
+  };
+}
+</programlisting>
+    <para>
+      This code is a little crazy, no doubt, but it's necessary because
+      the intuitive version
+    </para>
+    <programlisting>
+haskell.packages.ghc784 = super.haskell.packages.ghc784.override {
+  overrides = self: super: {
+    ghc-events = self.callPackage ./ghc-events-0.4.3.0.nix {};
+  };
+};
+</programlisting>
+    <para>
+      doesn't do what we want it to: that code replaces the
+      <literal>haskell</literal> package set in Nixpkgs with one that
+      contains only one entry,<literal>packages</literal>, which
+      contains only one entry <literal>ghc784</literal>. This override
+      loses the <literal>haskell.compiler</literal> set, and it loses
+      the <literal>haskell.packages.ghcXYZ</literal> sets for all
+      compilers but GHC 7.8.4. To avoid that problem, we have to perform
+      the convoluted little dance from above, iterating over each step
+      in hierarchy.
+    </para>
+    <para>
+      Once it's accomplished, however, we can install a variant of
+      <literal>ghc-events</literal> that's compiled with GHC 7.8.4:
+    </para>
+    <programlisting>
+nix-env -f &quot;&lt;nixpkgs&gt;&quot; -iA haskell.packages.ghc784.ghc-events
+</programlisting>
+    <para>
+      Unfortunately, it turns out that this build fails again while
+      executing the test suite! Apparently, the release archive on
+      Hackage is missing some data files that the test suite requires,
+      so we cannot run it. We accomplish that by re-generating the Nix
+      expression with the <literal>--no-check</literal> flag:
+    </para>
+    <programlisting>
+$ cabal2nix --no-check cabal://ghc-events-0.4.3.0 &gt;~/.nixpkgs/ghc-events-0.4.3.0.nix
+</programlisting>
+    <para>
+      Now the builds succeeds.
+    </para>
+    <para>
+      Of course, in the concrete example of
+      <literal>ghc-events</literal> this whole exercise is not an ideal
+      solution, because <literal>ghc-events</literal> can analyze the
+      output emitted by any version of GHC later than 6.12 regardless of
+      the compiler version that was used to build the `ghc-events'
+      executable, so strictly speaking there's no reason to prefer one
+      built with GHC 7.8.x in the first place. However, for users who
+      cannot use GHC 7.10.x at all for some reason, the approach of
+      downgrading to an older version might be useful.
+    </para>
+  </section>
+  <section xml:id="how-to-recover-from-ghcs-infamous-non-deterministic-library-id-bug">
+    <title>How to recover from GHC's infamous non-deterministic library
+    ID bug</title>
+    <para>
+      GHC and distributed build farms don't get along well:
+    </para>
+    <programlisting>
+https://ghc.haskell.org/trac/ghc/ticket/4012
+</programlisting>
+    <para>
+      When you see an error like this one
+    </para>
+    <programlisting>
+package foo-0.7.1.0 is broken due to missing package
+text-1.2.0.4-98506efb1b9ada233bb5c2b2db516d91
+</programlisting>
+    <para>
+      then you have to download and re-install <literal>foo</literal>
+      and all its dependents from scratch:
+    </para>
+    <programlisting>
+# nix-store -q --referrers /nix/store/*-haskell-text-1.2.0.4 \
+  | xargs -L 1 nix-store --repair-path --option binary-caches http://hydra.nixos.org
+</programlisting>
+    <para>
+      If you're using additional Hydra servers other than
+      <literal>hydra.nixos.org</literal>, then it might be necessary to
+      purge the local caches that store data from those machines to
+      disable these binary channels for the duration of the previous
+      command, i.e. by running:
+    </para>
+    <programlisting>
+rm /nix/var/nix/binary-cache-v3.sqlite
+rm /nix/var/nix/manifests/*
+rm /nix/var/nix/channel-cache/*
+</programlisting>
+  </section>
+  <section xml:id="builds-on-darwin-fail-with-math.h-not-found">
+    <title>Builds on Darwin fail with <literal>math.h</literal> not
+    found</title>
+    <para>
+      Users of GHC on Darwin have occasionally reported that builds
+      fail, because the compiler complains about a missing include file:
+    </para>
+    <programlisting>
+fatal error: 'math.h' file not found
+</programlisting>
+    <para>
+      The issue has been discussed at length in
+      <link xlink:href="https://github.com/NixOS/nixpkgs/issues/6390">ticket
+      6390</link>, and so far no good solution has been proposed. As a
+      work-around, users who run into this problem can configure the
+      environment variables
+    </para>
+    <programlisting>
+export NIX_CFLAGS_COMPILE=&quot;-idirafter /usr/include&quot;
+export NIX_CFLAGS_LINK=&quot;-L/usr/lib&quot;
+</programlisting>
+    <para>
+      in their <literal>~/.bashrc</literal> file to avoid the compiler
+      error.
+    </para>
+  </section>
+</section>
+
+<section xml:id="other-resources">
+  <title>Other resources</title>
+  <itemizedlist>
+    <listitem>
+      <para>
+        The Youtube video
+        <link xlink:href="https://www.youtube.com/watch?v=BsBhi_r-OeE">Nix
+        Loves Haskell</link> provides an introduction into Haskell NG
+        aimed at beginners. The slides are available at
+        http://cryp.to/nixos-meetup-3-slides.pdf and also -- in a form
+        ready for cut &amp; paste -- at
+        https://github.com/NixOS/cabal2nix/blob/master/doc/nixos-meetup-3-slides.md.
+      </para>
+    </listitem>
+    <listitem>
+      <para>
+        Another Youtube video is
+        <link xlink:href="https://www.youtube.com/watch?v=mQd3s57n_2Y">Escaping
+        Cabal Hell with Nix</link>, which discusses the subject of
+        Haskell development with Nix but also provides a basic
+        introduction to Nix as well, i.e. it's suitable for viewers with
+        almost no prior Nix experience.
+      </para>
+    </listitem>
+    <listitem>
+      <para>
+        Oliver Charles wrote a very nice
+        <link xlink:href="http://wiki.ocharles.org.uk/Nix">Tutorial how to
+        develop Haskell packages with Nix</link>.
+      </para>
+    </listitem>
+    <listitem>
+      <para>
+        The <emphasis>Journey into the Haskell NG
+        infrastructure</emphasis> series of postings describe the new
+        Haskell infrastructure in great detail:
+      </para>
+      <itemizedlist>
+        <listitem>
+          <para>
+            <link xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2015-January/015591.html">Part
+            1</link> explains the differences between the old and the
+            new code and gives instructions how to migrate to the new
+            setup.
+          </para>
+        </listitem>
+        <listitem>
+          <para>
+            <link xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2015-January/015608.html">Part
+            2</link> looks in-depth at how to tweak and configure your
+            setup by means of overrides.
+          </para>
+        </listitem>
+        <listitem>
+          <para>
+            <link xlink:href="http://lists.science.uu.nl/pipermail/nix-dev/2015-April/016912.html">Part
+            3</link> describes the infrastructure that keeps the
+            Haskell package set in Nixpkgs up-to-date.
+          </para>
+        </listitem>
+      </itemizedlist>
+    </listitem>
+  </itemizedlist>
+</section>
+
+</chapter>

doc/introduction.xml

@@ -0,0 +1,21 @@
+<chapter xmlns="http://docbook.org/ns/docbook"
+         xmlns:xlink="http://www.w3.org/1999/xlink"
+         xml:id="chap-introduction">
+
+<title>Introduction</title>
+
+<para>This manual tells you how to write packages for the Nix Packages
+collection (Nixpkgs).  Thus it’s for packagers and developers who want
+to add packages to Nixpkgs.  End users are kindly referred to the
+<link xlink:href="http://hydra.nixos.org/job/nix/trunk/tarball/latest/download-by-type/doc/manual">Nix
+manual</link>.</para>
+
+<para>This manual does not describe the syntax and semantics of the
+Nix expression language, which are given in the Nix manual in the
+<link
+xlink:href="http://hydra.nixos.org/job/nix/trunk/tarball/latest/download-by-type/doc/manual/#chap-writing-nix-expressions">chapter
+on writing Nix expressions</link>.  It only describes the facilities
+provided by Nixpkgs to make writing packages easier, such as the
+standard build environment (<literal>stdenv</literal>).</para>
+
+</chapter>