anchor.diff:      gtk3
     ];
   
  -  SEARCH_LIB = "${mesa}/lib";
  +  SEARCH_LIB = "${opengl-dummy}/lib";
   
     preConfigure = ''
       sed -i configure \
  
positive.code: , libnotify
  , libpng
  , libtiff
  , mesa
  , msgpack-c
  , xorg
  , xz
  , zlib
  
negative.code:     libnotify
      libpng
      libtiff
      msgpack-c
      opengl-dummy
      xorg.libICE
      xorg.libSM
      xorg.libX11
  