gistfile1.nix

{...}:

let
  sources = import ./nix/sources.nix;
  pkgs = import sources.nixpkgs {};
  hls  = import sources.hls-nix;
  hsPkgs = import ./default.nix {};
in
  hsPkgs.shellFor {
    packages = ps: with ps; [
      smurf
    ];

    withHoogle = true;

    tools = { cabal = "3.2.0.0"; hlint = "2.2.11"; brittany = "0.12.1.1"; };

    # Some you may need to get some other way.
    buildInputs = with pkgs.haskellPackages;
      [ autoexporter

        (callHackageDirect { pkg = "servant-serf"; ver="0.0.3"; sha256="09hrj5rvrcj2nz654gnydz7izw2981wvv1iw6f7gwcncizc0ri4q"; } {})
        # error
        # Setup: Encountered missing or private dependencies:
        # hpack >=0.34.2, tomland >=1.3.1.0

        hspec-discover
        stack
        ghcid
        pkgs.postgresql
      ];

    exactDeps = true;
  }