anchor.diff:      owner = "ipfs";
       repo = "go-ipfs";
       inherit rev;
  -    sha256 = "0wvjw8jziwhvfwhksg26qlj2irznl5bs2yll9jkv335pnwb5qi3v";
  +    sha256 = "1ry4a4pq26dbwy2b9cwi3xjaiyq6sng9lxnb1n30zxhp4w7rla2h";
     };
   
     meta = with stdenv.lib; {
  
positive.code: 
  buildGoPackage rec {
    name = "ipfs-${version}";
    version = "0.4.14";
    rev = "v${version}";
  
    goPackagePath = "github.com/ipfs/go-ipfs";
  
negative.code:   extraSrcPaths = [
      (fetchgx {
        inherit name src;
        sha256 = "0bysfh2hd040i8lnyzhy96frflls4kdnlw748cl51ngqg3rwbhgz";
      })
    ];
  
  