anchor.diff:      owner = "ipfs";
       repo = "ipfs-cluster";
       inherit rev;
  -    sha256 = "0q5j825hzsrlfv3y79376l6pd2d3hiczymw3w9nqh955rphjg7ci";
  +    sha256 = "1bxwcp0355f1ykjcidbxv218zp9d20nma7lnpn9xcjqc8vaq03kn";
     };
   
     nativeBuildInputs = [ gx-go ];
  
positive.code:   extraSrcPaths = [
      (fetchgx {
        inherit name src;
        sha256 = "0vqj6h885dy0d3zabris8f5sbqdwm5ljhpf8z466pwm7qx8m5afn";
      })
    ];
  
  
negative.code: 
  buildGoPackage rec {
    name = "ipfs-cluster-${version}";
    version = "0.9.0";
    rev = "v${version}";
  
    goPackagePath = "github.com/ipfs/ipfs-cluster";
  