anchor.diff:        file = "mesa/glx_ro_text_segm.patch";
         sha256 = "3f91c181307f7275f3c53ec172450b3b51129d796bacbca92f91e45acbbc861e";
       })
  -    (fetchTritonPatch {
  -      rev = "02cecd54589d7a77a38e4c183c24ffd30efdc9a7";
  -      file = "mesa/dlopen-absolute-paths.patch";
  -      sha256 = "aee62e3fcb535af73ba152c56c389d573efd6271f9aae702c0be98584643c518";
  -    })
     ];
   
     postPatch = ''
  
positive.code:   bindnow = false;
  
    passthru = {
      inherit driverSearchPath;
      srcVerification = fetchurl {
        failEarly = true;
        pgpsigUrls = map (n: "${n}.sig") src.urls;
  
negative.code:     "--with-dri-driverdir=$(drivers)/lib/dri"
      "--with-dri-searchpath=${driverSearchPath}/lib/dri"
      "--with-dri-drivers=i915,i965,nouveau,radeon,r200,swrast"
      "--with-vulkan-drivers=intel,radeon"
      #"--with-vulkan-icddir=DIR"
      #osmesa-bits=8
      #"--with-clang-libdir=${llvm}/lib"
  