anchor.diff:      libglvnd
       libomxil-bellagio
       libpthread-stubs
  -    # FIXME: recursive dependency
  -    #libva
  +    #libva  # FIXME: recursive dependency
       libvdpau
       libx11
       libxcb
  
positive.code: , flex
  , gettext
  , intltool
  , python2Packages
  
  , dri2proto
  
negative.code:     };
    };
  
    meta = with lib; {
      description = "An open source implementation of OpenGL";
      homepage = http://www.mesa3d.org/;
      license = licenses.mit;
  