tkimg: fix build on darwin

{ lib, fetchsvn, tcl, tcllib, tk, xorg }:

{ stdenv, lib, fetchsvn, tcl, tcllib, tk, xorg, darwin }:

tcl.mkTclDerivation rec {

  pname = "tkimg";

    "--with-tkinclude=${tk.dev}/include"

  ];

  buildInputs = [ xorg.libX11 tcllib ];

  buildInputs = [ xorg.libX11 tcllib ] ++ lib.optionals stdenv.isDarwin (with darwin.apple_sdk.frameworks; [

    Cocoa

  ]);

  meta = {

    homepage = "https://sourceforge.net/projects/tkimg/";