anchor.diff:    '';
   
     configureFlags = [
  -    "--enable-cli"
       "--enable-shared"
  -    "--enable-opencl"
  -    "--enable-gpl"
  -    "--enable-thread"
  -    "--disable-win32thread"
       "--disable-interlaced"
       "--bit-depth=${
         if (enable10bit) then
  
positive.code: 
  stdenv.mkDerivation rec {
    name = "x264-${version}";
    version = "20160119";
  
    src = fetchurl {
      url = "http://ftp.videolan.org/pub/videolan/x264/snapshots/" +
            "x264-snapshot-${version}-2245-stable.tar.bz2";
      sha256 = "1m7gncijx5wpsgrallmam8zl0sshx3di6svv0kj8rnp3wydn8q98";
    };
  
    nativeBuildInputs = [
  
negative.code:         "8"
      }"
      "--chroma-format=${chroma}"
      "--enable-pic"
      "--disable-avs"
      "--disable-swscale"
  