anchor.diff:                  "ln -sf ${kernelPackages.nvidia_x11_legacy96} /run/opengl-driver"
                 else if elem "nvidiaLegacy173" driverNames then
                   "ln -sf ${kernelPackages.nvidia_x11_legacy173} /run/opengl-driver"
  +              else if elem "ati_unfree" driverNames then
  +                "ln -sf ${kernelPackages.ati_drivers_x11} /run/opengl-driver"
                 else if cfg.driSupport then
                   "ln -sf ${pkgs.mesa} /run/opengl-driver"
                 else ""
  
positive.code:       optional (elem "virtualbox" driverNames) kernelPackages.virtualboxGuestAdditions ++
        optional (elem "ati_unfree" driverNames) kernelPackages.ati_drivers_x11;
  
      environment.etc = optionals cfg.exportConfiguration
        [ { source = "${configFile}";
            target = "X11/xorg.conf";
          }
  
negative.code:         { source = "${pkgs.xkeyboard_config}/etc/X11/xkb";
            target = "X11/xkb";
          }
        ])
      ++ (optionals (elem "ati_unfree" driverNames) [
  
          # according toiive on #ati you don't need the pcs, it is like registry... keeps old stuff to make your
          # life harder ;) Still it seems to be required
          { source = "${kernelPackages.ati_drivers_x11}/etc/ati";
            target = "ati";
          }
      ]);
  
      environment.x11Packages =
        [ xorg.xorgserver
  