anchor.diff:              attrByPath [name] (
                 if xorg ? ${"xf86video" + name} then {
                   modules = [ xorg.${"xf86video" + name} ];
  -              } else if ${"xf86-video-" + name} then {
  -                modules = [ ${"xf86-video-" + name} ];
  +              } else if pkgs ? ${"xf86-video-" + name} then {
  +                modules = [ pkgs.${"xf86-video-" + name} ];
                 } else null)
                 knownVideoDrivers;
             in
  
positive.code:     );
  
      environment.systemPackages = [
        xorg.xorgserver
        xorg.xrandr
        pkgs.xrdb
        xorg.setxkbmap
  
negative.code: 
      services.xserver.modules =
        concatLists (catAttrs "modules" cfg.drivers) ++ [
          pkgs.xorg-server
          pkgs.xf86-input-evdev
        ];
  
  