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: { stdenv
  , fetchgit
  , which
  
  , openssl
  , protobuf-cpp
  