anchor.diff:      buildInputs = [
         sasl boost gperftools pcre snappy
         zlib libyamlcpp sasl openssl libpcap
  -    ] ++ optional stdenv.is64bit wiredtiger;
  +    ]; # ++ optional stdenv.is64bit wiredtiger;
   
       other-args = concatStringsSep " " ([
         # these are opt-in, lol
  
positive.code: 
  with stdenv.lib;
  
  let version = "3.0.6";
      system-libraries = [
        "pcre"
        "wiredtiger"
        "boost"
        "snappy"
        "zlib"
  
negative.code: 
    src = fetchurl {
      url = "http://downloads.mongodb.org/src/mongodb-src-r${version}.tar.gz";
      sha256 = "1rx7faqsq733vdriavdfmvx75nhjq9nm5bgwd3hw1cxzqgkvl99d";
    };
  
    nativeBuildInputs = [ scons ];
  