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

let

  inherit (nixpkgs) pkgs;

  f = { mkDerivation, base, configurator, directory, filepath, mtl
      , selda, selda-sqlite, stdenv, text
      }:
      mkDerivation {
        pname = "bisc";
        version = "0.2.1.0";
        src = ./.;
        isLibrary = false;
        isExecutable = true;
        executableHaskellDepends = [
          base configurator directory filepath mtl selda selda-sqlite text
        ];
        homepage = "https://maxwell.ydns.eu/git/rnhmjoj/bisc";
        description = "A small tool that clears qutebrowser cookies";
        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