path: root/third_party/overlays/haskell/default.nix

# Defines an overlay for overriding Haskell packages, for example to
# avoid breakage currently present in nixpkgs or to modify package
# versions.

{ ... }: # This file needs nothing from readTree

self: super: # overlay parameters for the nixpkgs overlay

let
  overrides = hsSelf: hsSuper: with super.haskell.lib; rec {
    generic-arbitrary = appendPatch hsSuper.generic-arbitrary
      [ ./patches/generic-arbitrary-export-garbitrary.patch ];

    # random = dontCheck (hsSuper.callHackageDirect {
    #   pkg = "random";
    #   ver = "1.2.0";
    #   sha256 = "06s3mmqbsfwv09j2s45qnd66nrxfp9280gnl9ng8yh128pfr7bjh";
    # } {});

    # random <1.2
    test-framework = doJailbreak hsSuper.test-framework;
    hashable = doJailbreak hsSuper.hashable;
    test-framework-quickcheck2 = doJailbreak hsSuper.test-framework-quickcheck2;

    # can be removed if we have the following PR or equivalent
    # https://github.com/NixOS/nixpkgs/pull/116931
    hedgehog-classes = overrideCabal hsSuper.hedgehog-classes (attrs: {
      # remove version bound on semirings which is inside a
      # conditional, so doJailbreak doesn't work
      prePatch = ''
        sed -i 's|semirings.*0.6|semirings|g' hedgehog-classes.cabal
      '';
    });

    hgeometry-combinatorial = dontCheck hsSuper.hgeometry-combinatorial;
  };
in {
  haskellPackages = super.haskellPackages.override {
    inherit overrides;
  };
}