diff options
Diffstat (limited to 'pkgs/top-level/splice.nix')
| -rw-r--r-- | pkgs/top-level/splice.nix | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/pkgs/top-level/splice.nix b/pkgs/top-level/splice.nix index f57f42020c27a..7afbd956d5bb6 100644 --- a/pkgs/top-level/splice.nix +++ b/pkgs/top-level/splice.nix @@ -17,7 +17,11 @@ # `mkDerivation` knows how to pull out the right ones for `buildDepends` and # friends, but a few packages use them directly, so it seemed efficient (to # @Ericson2314) to reuse those names, at least initially, to minimize breakage. -lib: pkgs: +# +# For performance reasons, rather than uniformally splice in all cases, we only +# do so when `pkgs` and `buildPackages` are distinct. The `actuallySplice` +# parameter there the boolean value of that equality check. +lib: pkgs: actuallySplice: let defaultBuildScope = pkgs.buildPackages // pkgs.buildPackages.xorg; @@ -58,7 +62,10 @@ let }; in lib.listToAttrs (map merge (lib.attrNames mash)); - splicedPackages = splicer defaultBuildScope defaultRunScope; + splicedPackages = + if actuallySplice + then splicer defaultBuildScope defaultRunScope + else pkgs // pkgs.xorg; in |