gistfile1.txt

  environment.systemPackages = with pkgs; [
.
.
.
    (haskellPackages.ghcWithHoogle (h: with h; [
      diagrams
      diagrams-gtk
      lens
      io-memoize
      haskeline
      pointfree
      xmonad
      xmonad-contrib
      xmonad-extras
      happy
      alex
      gloss
      matrix
    ]))
 .
 .
 .
]