anchor.diff:  { lib, stdenv, fetchurl, which, m4
  -, protobuf, boost, zlib, curl, openssl, icu, jemalloc, libtool
  +, protobuf, boost170, zlib, curl, openssl, icu, jemalloc, libtool
   , python2Packages, makeWrapper
   }:
   
  
positive.code: 
    makeFlags = [ "rethinkdb" ];
  
    buildInputs = [ protobuf boost zlib curl openssl icu ]
      ++ lib.optional (!stdenv.isDarwin) jemalloc
      ++ lib.optional stdenv.isDarwin libtool;
  
  
negative.code:       query language that supports really useful queries like table
        joins and group by, and is easy to setup and learn.
      '';
      homepage    = "https://rethinkdb.com";
      license     = lib.licenses.asl20;
      platforms   = lib.platforms.linux;
      maintainers = with lib.maintainers; [ thoughtpolice bluescreen303 ];
  