{ pkgs ? import <nixpkgs> {}
, ghc ? null
}:
let
  haskellPackages =
    if ghc == null
    then pkgs.haskellPackages
    else pkgs.haskell.packages.${ghc};
  hs = haskellPackages.extend (with pkgs.haskell.lib;
    packageSourceOverrides {
      symantic-parser = ./.;
    }
  );
in hs.symantic-parser // {
  shell = hs.shellFor {
    packages = p: [ p.symantic-parser ];
    nativeBuildInputs = [
      hs.cabal-install
      hs.hie
    ];
    buildInputs = [
      #hs.ghcid
      hs.ormolu
      hs.hlint
      #pkgs.nixpkgs-fmt
    ];
    #withHoogle = true;
  };
}