anchor.diff:  
   buildGoPackage rec {
     name = "ipfs-cluster-${version}";
  -  version = "0.5.0";
  +  version = "0.7.0";
     rev = "v${version}";
   
     goPackagePath = "github.com/ipfs/ipfs-cluster";
  
positive.code:     owner = "ipfs";
      repo = "ipfs-cluster";
      inherit rev;
      sha256 = "132whjyplcifq8747hcdrgbc0amhp618dg049jq5nyslcxfgdypm";
    };
  
    nativeBuildInputs = [ gx-go ];
  
negative.code:   extraSrcPaths = [
      (fetchgx {
        inherit name src;
        sha256 = "19ljx4q9msrv5wwyd85l01l320lhwgma5z3b756ldgj9fs8p9ph6";
      })
    ];
  
  