anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "x265";
  -  inherit version src patches;
  +  inherit version src;
   
     enableParallelBuilding = true;
   
     postPatch = ''
       sed -i 's/unknown/${version}/g' source/cmake/version.cmake
  +    sed -i 's/0.0/${version}/g' source/cmake/version.cmake
     '';
   
     cmakeFlags = [
  
positive.code: { stdenv, fetchurl, fetchpatch, cmake, nasm, numactl
  , numaSupport ? stdenv.hostPlatform.isLinux && (stdenv.hostPlatform.isx86 || stdenv.hostPlatform.isAarch64)  # Enabled by default on NUMA platforms
  , debugSupport ? false # Run-time sanity checks (debugging)
  , werrorSupport ? false # Warnings as errors
  
negative.code:     (mkFlag werrorSupport "WARNINGS_AS_ERRORS")
    ];
  
    version = "3.4";
  
    src = fetchFromBitbucket {
      owner = "multicoreware";
      repo = "x265_git";
      rev = "${version}";
      sha256 = "1jzgv2hxhcwmsdf6sbgyzm88a46dp09ll1fqj92g9vckvh9a7dsn";
    };
  
    buildLib = has12Bit: stdenv.mkDerivation rec {
      name = "libx265-${if has12Bit then "12" else "10"}-${version}";
      inherit src;
      enableParallelBuilding = true;
  
      postPatch = ''
        sed -i 's/unknown/${version}/g' source/cmake/version.cmake
        sed -i 's/0.0/${version}/g' source/cmake/version.cmake
      '';
  
      cmakeLibFlags = [
  