anchor.diff:      makeQtWrapper $out/mudlet $out/bin/mudlet \
         --set LUA_CPATH "${luaEnv}/lib/lua/${lua.luaversion}/?.so" \
         --prefix LUA_PATH : "$NIX_LUA_PATH" \
  +      --prefix LD_LIBRARY_PATH : "${libsForQt5.qtkeychain}/lib/" \
         --run "cd $out";
     '';
   
  
positive.code: in
  stdenv.mkDerivation rec {
    pname = "mudlet";
    version = "4.1.2";
  
    src = fetchFromGitHub {
      owner = "Mudlet";
      repo = "Mudlet";
      rev = "Mudlet-${version}";
      fetchSubmodules = true;
      sha256 = "1d6r51cj8a71hmhzsayd2far4hliwz5pnrsaj3dn39m7c0iikgdn";
    };
  
    nativeBuildInputs = [ cmake wrapQtAppsHook qttools which ];
    buildInputs = [
      pcre pugixml qtbase qtmultimedia luaEnv libzip libGLU yajl boost hunspell
    ];
  
    WITH_FONTS = "NO";
  
negative.code: { fetchFromGitHub, fetchpatch, stdenv, wrapQtAppsHook, git, pcre, pugixml, qtbase, libsForQt5, qtmultimedia, qttools, yajl, libzip, hunspell
  , boost, libGLU, lua, cmake,  which, }:
  
  let
  