Wroclaw
a26bb74da1
that is, only when buildPlatform and hostPlatform are not identical, fixes difference and build failure of stdenv, when using through overlay certain odd packages like `androidStudioPackages.canary`
49 lines
2.1 KiB
Nix
49 lines
2.1 KiB
Nix
self: super:
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let
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nixos = self.config.nixos or true;
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unstableRevision = self.config.unstableRevision or null;
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unstableRevisionHash = self.config.unstableRevisionHash or null;
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useUnstable = self.config.useUnstable or true;
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unstablePkgsExprs = if !builtins.isNull unstableRevision
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then if !builtins.isNull unstableRevisionHash
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then builtins.fetchTarball {
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url = "https://github.com/NixOS/nixpkgs/archive/${unstableRevision}.tar.gz";
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sha256 = unstableRevisionHash;
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}
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else builtins.fetchTarball "https://github.com/NixOS/nixpkgs/archive/${unstableRevision}.tar.gz"
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else if nixos
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then builtins.fetchTarball "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz"
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else builtins.fetchTarball "https://channels.nixos.org/nixpkgs-unstable/nixexprs.tar.xz";
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# Compiled nixpkgs expression eg expressions from a nix channel
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nixpkgsVersion = builtins.concatStringsSep "." [
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(builtins.readFile "${unstablePkgsExprs}/.version")
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(builtins.readFile "${unstablePkgsExprs}/.version-suffix")
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];
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nixpkgsRevision = (builtins.readFile "${unstablePkgsExprs}/.git-revision");
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unstablePkgsForNixpkgs = nixpkgs: import unstablePkgsExprs {
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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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unstableVersion = self.lib.optionalString useUnstable nixpkgsVersion;
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unstableRevision = self.lib.optionalString useUnstable nixpkgsRevision;
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}
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