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jb55/override-haskell.nix

Last active April 16, 2018 10:01
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override-haskell.nix
packageOverrides = super: {
haskellPackages = super.haskellPackages.override {
overrides = {
some-pkg = pkgs.haskell.lib.overrideCabal super.some-pkg (orig: {
src = fetchFromGithub {};
});
};
};
@vaibhavsagar
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I think this should be

packageOverrides = super: {
  haskellPackages = super.haskellPackages.override {
    overrides = _self: _super: {
      some-pkg = pkgs.haskell.lib.overrideCabal super.some-pkg (orig: {
        src = fetchFromGithub {};
      });
  };
};

@vaibhavsagar
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You can also use extend, which has less nesting:

packageOverrides = super: {
  haskellPackages = super.haskellPackages.extend (_self: _super: {
    some-pkg = pkgs.haskell.lib.overrideCabal super.some-pkg (orig: {
      src = fetchFromGithub {};
    })
  );
};

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