31 lines
951 B
Nix
31 lines
951 B
Nix
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{
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unstableSource,
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}:
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self: super:
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let
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useUnstable = self.config.useUnstable or true;
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unstablePkgsForNixpkgs = nixpkgs: import unstableSource {
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# localSystem -> pkgs.stdenv.buildPlatform
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localSystem = nixpkgs.stdenv.buildPlatform;
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# crossSystem -> pkgs.stdenv.hostPlatform or pkgs.stdenv.targetPlatform ??
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# passing below
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# config -> pkgs.config
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config = nixpkgs.config;
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# overlays -> partial of pkgs.overlays
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overlays = nixpkgs.overlays;
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# crossOverlays -> partial of pkgs.overlays
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# crossOverlays are merged to overlays, not sure what issues that might raise.
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# ignoring.
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} // (if nixpkgs.stdenv.buildPlatform == nixpkgs.stdenv.hostPlatform then {} else {
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# workaround for some odd structured packages that changes behaviour
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# when crossSystem is passed.
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crossSystem = nixpkgs.stdenv.hostPlatform;
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});
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in
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{
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unstable = if useUnstable then unstablePkgsForNixpkgs self else self;
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}
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