{ stdenv
, ghc
, gf-core
, fetchFromGitHub
}:

stdenv.mkDerivation (finalAttrs: {
  name = "gf-rgl";
  version = "20250812";
  src = fetchFromGitHub {
    owner = "GrammaticalFramework";
    repo = "gf-rgl";
    tag = finalAttrs.version;
    hash = "sha256-rqN5MV/XxChXC+Vs4aLIhRtyPQZNk0LQZ2TCdbd6wUw=";
  };
  buildInputs = [ ghc gf-core ];
  LC_ALL = "C.UTF-8";
  buildPhase = ''
    runghc Setup.hs build
  '';
  installPhase = ''
    mkdir -p $out/share/gf/lib
    runghc Setup.hs copy --dest=$out/share/gf/lib
  '';
})