anchor.diff:  
     profile = ''
       export STEAM_RUNTIME=/steamrt
  -    export TZDIR=/etc/zoneinfo
     '';
   
     runScript = writeScript "steam-wrapper.sh" ''
  
positive.code:       perl
        # Open URLs
        xdg_utils
        # Zoneinfo
        etc-zoneinfo
        iana-etc
      ] ++ lib.optional withJava jdk
        ++ lib.optional withPrimus primus
  
negative.code: 
  let
    commonTargetPkgs = pkgs: with pkgs;
      [
        steamPackages.steam-fonts
        # Errors in output without those
        pciutils
  