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| author | Robert Hensing <robert@roberthensing.nl> | 2018-10-27 14:00:19 +0200 |
|---|---|---|
| committer | Robert Hensing <robert@roberthensing.nl> | 2018-10-27 14:00:19 +0200 |
| commit | 889a5c35127e4e6b2c722611dcaa9c802337446b (patch) | |
| tree | 18ea222e43ee0985dbb6f70e9ae01e357a421593 /pkgs | |
| parent | 450d33fc5b04828af3b2527f6cc99f9189d80604 (diff) | |
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pkgs.appendOverlays: Avoid unnecessary nixpkgs evaluation
Diffstat (limited to 'pkgs')
| -rw-r--r-- | pkgs/top-level/stage.nix | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/pkgs/top-level/stage.nix b/pkgs/top-level/stage.nix index 37724a870a3..d270a6608a1 100644 --- a/pkgs/top-level/stage.nix +++ b/pkgs/top-level/stage.nix @@ -164,7 +164,9 @@ let # preexisting overlays. Prefer to initialize with the right overlays # in one go when calling Nixpkgs, for performance and simplicity. appendOverlays = extraOverlays: - import ./stage.nix (args // { overlays = args.overlays ++ extraOverlays; }); + if extraOverlays == [] + then self + else import ./stage.nix (args // { overlays = args.overlays ++ extraOverlays; }); # Extend the package set with a single overlay. This preserves # preexisting overlays. Prefer to initialize with the right overlays |