anchor.diff:      zlib
     ];
   
  -  # Don't vendor packages we have
  -  postPatch = ''
  -    sed -i 's,PROVIDER "module",PROVIDER "package",g' CMakeLists.txt
  -  '';
  -
     NIX_CFLAGS_LINK = [
       "-pthread"
       "-lprotobuf"
       "-lprotoc"
     ];
  +
  +  preBuild = ''
  +    makeFlagsArray+=("prefix=$out")
  +  '';
   
     meta = with stdenv.lib; {
       maintainers = with maintainers; [
  
positive.code: }:
  
  let
    version = "2016-10-17";
  in
  stdenv.mkDerivation {
    name = "grpc-${version}";
  
negative.code:   src = fetchgit {
      version = 2;
      url = "https://github.com/grpc/grpc.git";
      rev = "566608e275c8b4b7bb9f8f61bb4d477e9c2dabc0";
      sha256 = "0wx42jwys7bss13b2qj48dw9x9r79zz39iynn1f3y64yyj872bza";
    };
  
    nativeBuildInputs = [
      which
    ];
  
    buildInputs = [
  