anchor.diff:        sha256 = "1psryc2ql1cp91xd3f8jz84mdaqvwzkdq2pr96nwn03ds4cd88wh";
       };
   
  +    configureFlags = [ "--enable-mcpplib" ];
       installFlags = [ "PREFIX=$(out)" ];
  -  });
  +  };
   
   in stdenv.mkDerivation rec {
     pname = "zeroc-ice";
  
positive.code: { stdenv, lib, fetchFromGitHub, mcpp, bzip2, expat, openssl, lmdb
  , darwin, libiconv, Security
  , cpp11 ? false
  }:
  
  let
    zeroc_mcpp = mcpp.overrideAttrs (self: rec {
      pname = "zeroc-mcpp";
      version = "2.7.2.14";
  
  
negative.code:   '';
  
    meta = with stdenv.lib; {
      homepage = "https://www.zeroc.com/ice.html";
      description = "The internet communications engine";
      license = licenses.gpl2;
      platforms = platforms.unix;
  