all-cabal-hashes.nix

let
  all-cabal-hashes-component = name: version: type:
  builtins.fetchurl
  "https://raw.githubusercontent.com/commercialhaskell/all-cabal-hashes/hackage/${name}/${version}/${name}.${type}";
in self: super: {
  haskellPackages = super.haskellPackages.override {
    overrides = self: super: {
      hackage2nix = name: version:
      self.haskellSrc2nix {
        name = "${name}-${version}";
        sha256 = ''
          $(sed -e 's/.*"SHA256":"//' -e 's/".*$//' "${
            all-cabal-hashes-component name version "json"
          }")'';
        src = all-cabal-hashes-component name version "cabal";
      };
    };
  };
}