anchor.diff:      owner = "ethereum";
       repo = "go-ethereum";
       rev = "v${version}";
  -    sha256 = "19cq0pmif4y33v34jzvam4mcszl8vf2saf2gzfz01l4x1iv4hf1r";
  +    sha256 = "0ybjaiyrfb320rab6a5r9iiqvkrcd8b2qvixzx0kjmc4a7l1q5zh";
     };
   
     # Fix cyclic referencing on Darwin
  
positive.code:     done
    '';
  
    meta = {
      homepage = https://ethereum.github.io/go-ethereum/;
      description = "Official golang implementation of the Ethereum protocol";
      license = with lib.licenses; [ lgpl3 gpl3 ];
    };
  }
  
negative.code: 
  buildGoPackage rec {
    name = "go-ethereum-${version}";
    version = "1.7.0";
    goPackagePath = "github.com/ethereum/go-ethereum";
  
    # Fixes Cgo related build failures (see https://github.com/NixOS/nixpkgs/issues/25959 )
  