anchor.diff:  
   stdenv.mkDerivation rec {
     name = "x264-${version}";
  -  version = "20160119";
  +  version = "20160301";
   
     src = fetchurl {
       url = "http://ftp.videolan.org/pub/videolan/x264/snapshots/" +
             "x264-snapshot-${version}-2245-stable.tar.bz2";
  -    sha256 = "1m7gncijx5wpsgrallmam8zl0sshx3di6svv0kj8rnp3wydn8q98";
  +    sha256 = "1h023a2id71mk15rcgk838lwqc6alk2df0nyflg7ycb97f85ckys";
     };
   
     nativeBuildInputs = [
  
positive.code:   '';
  
    configureFlags = [
      "--enable-cli"
      "--enable-shared"
      "--enable-opencl"
      "--enable-gpl"
      "--enable-thread"
      "--disable-win32thread"
      "--disable-interlaced"
      "--bit-depth=${
        if (enable10bit) then
  
negative.code:         "8"
      }"
      "--chroma-format=${chroma}"
      "--enable-pic"
      "--disable-avs"
      "--disable-swscale"
  