anchor.diff:    '';
   
     configureFlags = [
  -    "--enable-glx"
  +    "--${boolEn opengl-dummy.glx}-glx"
       "--disable-debug"
       "--enable-tracer"
     ];
   
  -  meta = with stdenv.lib; {
  +  meta = with lib; {
       description = "VDPAU Backend for Video Acceleration (VA) API";
       homepage = https://www.freedesktop.org/wiki/Software/vaapi;
       license = licenses.gpl2;
  
positive.code: , autoreconfHook
  , fetchTritonPatch
  , fetchurl
  
  , libvdpau
  , libva
  , libx11
  , mesa
  , xproto
  }:
  
  stdenv.mkDerivation rec {
    name = "libva-vdpau-driver-0.7.4";
  
  
negative.code:     libvdpau
      libva
      libx11
      opengl-dummy
      xproto
    ];
  
  