{
  buildEnv,
  #
  pkgs,
}:
buildEnv {
  name = "haskell";
  paths = with pkgs; [
    #
    # XMonad
    #
    (haskellPackages.ghcWithPackages (self: [
      # https://github.com/ValveSoftware/steam-for-linux/issues/9376
      # opt into 0.18.1 specifically
      self.xmonad-contrib_0_18_1

      self.xmonad-extras
    ]))
    haskell-language-server
    cabal-install
  ];
}