{ nixpkgs ? import <nixpkgs> {}
, compiler ? "default"
, doBenchmark ? false
}:

let

  inherit (nixpkgs) pkgs;

  sdl = with haskellPackages; callPackage(
    { mkDerivation, base, bytestring, deepseq, exceptions, linear, SDL2
    , StateVar, stdenv, text, transformers, vector, weigh
    }:
    mkDerivation {
      pname = "sdl2";
      version = "2.4.1.0";
      sha256 = "21a569c0c19f8ff2bbe1cf1d3eb32f65e8143806de353cedd240df5e9d088b5c";
      isLibrary = true;
      isExecutable = true;
      enableSeparateDataOutput = true;
      libraryHaskellDepends = [
        base bytestring exceptions linear StateVar text transformers vector
      ];
      librarySystemDepends = [ SDL2 ];
      libraryPkgconfigDepends = [ SDL2 ];
      doCheck = false;
      testHaskellDepends = [ base deepseq linear vector weigh ];
      description = "Both high- and low-level bindings to the SDL library (version 2.0.4+).";
      license = stdenv.lib.licenses.bsd3;
    }) {};

  nanovgNeko = with haskellPackages; callPackage ({
    mkDerivation, base, bytestring, c2hs, containers, glew, hspec,
    inline-c, libGL, libGLU, QuickCheck, text, vector, pkgconfig }:
    mkDerivation {
      pname = "nanovg";
      version = "0.6.0.0";
      #src = pkgs.fetchFromGitHub {
      #  owner = "nek0";
      #  repo = "nanovg-hs";
      #  rev = "21868dc2c8e6eae8e7c0962d22890a8f2522cab0";
      #  sha256 = "0diyyajniyxzmg5za34crwwlajf40x8bplja6mbgv2syax5d446d";
      #  fetchSubmodules = true;
      #};
      src = ../nanovg-hs;
      revision = "1";
      isLibrary = true;
      isExecutable = true;
      doCheck = false;
      libraryHaskellDepends = [ base bytestring containers text vector ];
      librarySystemDepends = [ glew libGL libGLU pkgconfig ];
      libraryToolDepends = [ c2hs ];
      testHaskellDepends = [ base containers hspec inline-c QuickCheck ];
      homepage = "https://github.com/cocreature/nanovg-hs";
      description = "Haskell bindings for nanovg";
      license = pkgs.stdenv.lib.licenses.isc;
      hydraPlatforms = pkgs.stdenv.lib.platforms.none;
    }) { inherit (pkgs) glew; inherit (pkgs) libGL; inherit (pkgs) libGLU; inherit (pkgs) pkgconfig; };


  f = { mkDerivation, affection, base, containers, glew
      , linear, OpenGL, random, stdenv, stm
      }:
      mkDerivation {
        pname = "haskelloids";
        version = "0.0.0.1";
        src = ./.;
        isLibrary = false;
        isExecutable = true;
        enableExecutableProfiling = true;
        executableHaskellDepends = [
          affection base containers linear nanovgNeko OpenGL random sdl stm
        ];
        executableSystemDepends = [ glew ];
        executablePkgconfigDepends = [ glew ];
        description = "A little game using Affection";
        license = stdenv.lib.licenses.gpl3;
      };

  haskellPackages = if compiler == "default"
                       then pkgs.haskellPackages
                       else pkgs.haskell.packages.${compiler};

  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;

  drv = variant (haskellPackages.callPackage f {});

in

  if pkgs.lib.inNixShell then drv.env else drv