anchor.diff:  
     src = fetchurl {
       url = "http://tuxera.com/opensource/ntfs-3g_ntfsprogs-${version}.tgz";
  -    sha256 = "1wiqcmy07y02k3iqq56cscnhg5syisbjj9mxfaid85l3bl0rdycp";
  +    sha256 = "180y5y09h30ryf2vim8j30a2npwz1iv9ly5yjmh3wjdkwh2jrdyp";
     };
   
     patchPhase = ''
  
positive.code:     '';
  
    meta = with stdenv.lib; {
      homepage = http://www.tuxera.com/community/;
      description = "FUSE-based NTFS driver with full write support";
      maintainers = [ maintainers.urkud ];
      platforms = platforms.linux;
      license = licenses.gpl2Plus; # and (lib)fuse-lite under LGPL2+
    };
  
negative.code: 
  stdenv.mkDerivation rec {
    pname = "ntfs-3g";
    version = "2016.2.22";
    name = "${pname}-${version}";
  
    buildInputs = [ libuuid ] ++ stdenv.lib.optionals crypto [ gnutls libgcrypt ];
  