{ pkgs ? import <nixpkgs> {}
, ghc ? "ghc901"
, withHoogle ? false
}:
let
  haskellPackages =
    if ghc == null
    then pkgs.haskellPackages
    else pkgs.haskell.packages.${ghc};
  hs = haskellPackages.extend (with pkgs.haskell.lib;
    hself: hsuper:
    {
      data-fix = doJailbreak hsuper.data-fix;
      primitive = doJailbreak hsuper.primitive;
      assoc = doJailbreak hsuper.assoc;
      these = doJailbreak hsuper.these;
      dump-core = dontCheck (unmarkBroken hsuper.dump-core);
      #profunctors = doJailbreak (unmarkBroken hsuper.profunctors);
      #th-expand-syns = doJailbreak (unmarkBroken hsuper.th-expand-syns);
      profunctors = dontCheck (unmarkBroken (doJailbreak (hsuper.callHackageDirect
        { pkg = "profunctors";
          ver = "5.6.2";
          sha256 = "sha256-Vrlp6lvMNi+Bk+AHBMbnQE9NVzdASrcrFaWbkJew9qU=";
        } {})));
      system-fileio = doJailbreak hsuper.system-fileio;
      turtle = doJailbreak hsuper.turtle;

      #symantic-parser = enableExecutableProfiling (doCheck ( hself.callCabal2nix "symantic-parser" ./. {}));
    } //
    packageSourceOverrides {
      symantic-parser = ./.;
    } hself hsuper
  );
in hs.symantic-parser // {
  shell = hs.shellFor {
    packages = p: [ p.symantic-parser ];
    nativeBuildInputs = [
      hs.cabal-install
      #hs.ghc-events
      #hs.ghc-events-analyze
      #hs.threadscope
      #hs.haskell-language-server
      #hs.hpc
    ];
    buildInputs = [
      #hs.ghcid
      pkgs.ormolu
      #hs.hlint
      #pkgs.nixpkgs-fmt
    ];
    inherit withHoogle;
  };
}