anchor.diff:  }:
   
   let
  -  version = "1.9.0";
  +  version = "1.10.0";
   in
   stdenv.mkDerivation {
     name = "grpc-${version}";
  
positive.code:     owner = "grpc";
      repo = "grpc";
      rev = "v${version}";
      sha256 = "05728b472785835b9921054d17594f5c35637282f757c025fc0e0fe8ba667610";
    };
  
    nativeBuildInputs = [
  
negative.code:   ];
  
    preBuild = ''
      sed -i 's,\(grpc++.*\.so\.\)6,\11,g' Makefile
      makeFlagsArray+=("prefix=$out")
    '';
  
  