diff --git a/ci/eval/attrpaths.nix b/ci/eval/attrpaths.nix
index 0c571c7be4be..c4e9db24b20e 100644
--- a/ci/eval/attrpaths.nix
+++ b/ci/eval/attrpaths.nix
@@ -2,19 +2,12 @@
 # *superset* of all attrpaths of derivations which might be
 # part of a release on *any* platform.
 #
-# Both this expression and what ofborg uses (outpaths.nix)
-# are essentially single-threaded (under the current cppnix
-# implementation).
-#
-# This expression runs much, much, much faster and uses much, much
-# less memory than the ofborg script by skipping the
-# platform-relevance checks.  The ofborg outpaths.nix script takes
-# half an hour on a 3ghz core and peaks at 60gbytes of memory; this
-# expression runs on the same machine in 44 seconds with peak memory
-# usage of 5gbytes.
+# This expression runs single-threaded under all current Nix
+# implementations, but much faster and with much less memory
+# used than ./outpaths.nix itself.
 #
 # Once you have the list of attrnames you can split it up into
-# $NUM_CORES batches and run the platform checks separately for each
+# $NUM_CORES batches and evaluate the outpaths separately for each
 # batch, in parallel.
 #
 # To dump the attrnames:
diff --git a/ci/eval/compare/default.nix b/ci/eval/compare/default.nix
index cfd9b78510d0..f5c1b1b1dab0 100644
--- a/ci/eval/compare/default.nix
+++ b/ci/eval/compare/default.nix
@@ -105,7 +105,6 @@ let
           ) rebuildsByKernel
           # Set the "11.by: package-maintainer" label to whether all packages directly
           # changed are maintained by the PR's author.
-          # (https://github.com/NixOS/ofborg/blob/df400f44502d4a4a80fa283d33f2e55a4e43ee90/ofborg/src/tagger.rs#L83-L88)
           // {
             "11.by: package-maintainer" =
               maintainers ? ${githubAuthorId}
diff --git a/ci/eval/compare/maintainers.nix b/ci/eval/compare/maintainers.nix
index 488eb0ea9201..d0c5057a0499 100644
--- a/ci/eval/compare/maintainers.nix
+++ b/ci/eval/compare/maintainers.nix
@@ -1,7 +1,6 @@
 {
   lib,
 }:
-# Almost directly vendored from https://github.com/NixOS/ofborg/blob/5a4e743f192fb151915fcbe8789922fa401ecf48/ofborg/src/maintainers.nix
 {
   changedattrs,
   changedpathsjson,
diff --git a/ci/eval/outpaths.nix b/ci/eval/outpaths.nix
index 9e67da1fe73a..a8485af326fc 100644
--- a/ci/eval/outpaths.nix
+++ b/ci/eval/outpaths.nix
@@ -2,8 +2,6 @@
 # When using as a callable script, passing `--argstr path some/path` overrides $PWD.
 #!nix-shell -p nix -i "nix-env -qaP --no-name --out-path --arg checkMeta true -f ci/eval/outpaths.nix"
 
-# Vendored from:
-#   https://raw.githubusercontent.com/NixOS/ofborg/74f38efa7ef6f0e8e71ec3bfc675ae4fb57d7491/ofborg/src/outpaths.nix
 {
   checkMeta,
   includeBroken ? true, # set this to false to exclude meta.broken packages from the output