anchor.diff:    xorgDeps = pkgs: with pkgs.xorg; [
       libX11 libXrender libXrandr libxcb libXmu libpthreadstubs libXext libXdmcp
       libXxf86vm libXinerama libSM libXv libXaw libXi libXcursor libXcomposite
  -    xrandr
     ];
   
   in buildFHSUserEnv {
  
positive.code:     bison flex
  
      # WINE
      perl which p7zip gnused gnugrep psmisc cups lcms2 mpg123 cairo unixODBC
      samba4 sane-backends openldap opencl-headers ocl-icd utillinux
  
      # ZDOOM
      soundfont-fluid bzip2 game-music-emu
    ] ++ qt5Deps pkgs
      ++ gnome3Deps pkgs
      ++ xorgDeps pkgs
      ++ lib.optional steamSupport pkgs.steam;
  
    extraInstallCommands = ''
      mkdir -p $out/share
  
negative.code: 
    targetPkgs = pkgs: with pkgs; [
      lutris-unwrapped
  
      # Adventure Game Studio
      allegro dumb
  