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top-level/stage: assert no by-name overwrites #454147

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top-level/stage: assert no by-name overwrites #454147

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4 changes: 4 additions & 0 deletions pkgs/top-level/stage.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -186,7 +186,11 @@ let
overlays
;
} res self super;

conflictingAttrs = lib.intersectAttrs res super;
in
assert lib.assertMsg (conflictingAttrs == { })
"The following attributes were defined both in `pkgs/top-level/all-packages.nix` and elsewhere, most likely in `pkgs/by-name/`: ${lib.concatStringsSep ", " (lib.attrNames conflictingAttrs)}";
res;

aliases = self: super: lib.optionalAttrs config.allowAliases (import ./aliases.nix lib self super);
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