anchor.diff:      libX11 libXext libxcb libXt libXfixes libxshmfence libXrandr
       libffi libvdpau libelf libXvMC
       libpthreadstubs openssl /*or another sha1 provider*/
  -    python2 python2.pkgs.Mako
     ] ++ lib.optionals (elem "wayland" eglPlatforms) [ wayland wayland-protocols ]
       ++ lib.optionals stdenv.isLinux [ valgrind-light libomxil-bellagio libva-minimal ];
   
  
positive.code:     "--disable-opencl"
    ];
  
    nativeBuildInputs = [ autoreconfHook intltool pkgconfig file ];
  
    propagatedBuildInputs = with xorg;
      [ libXdamage libXxf86vm ]
      ++ optional stdenv.isLinux libdrm
      ++ optionals stdenv.isDarwin [ OpenGL Xplugin ];
  
    buildInputs = with xorg; [
  
negative.code: , pkgconfig, intltool, autoreconfHook
  , file, expat, libdrm, xorg, wayland, wayland-protocols, openssl
  , llvmPackages, libffi, libomxil-bellagio, libva-minimal
  , libelf, libvdpau, valgrind-light, python2, python2Packages
  , libglvnd
  , enableRadv ? true
  , galliumDrivers ? null
  