config.nix

{
  packageOverrides = super: let self = super.pkgs; in

  rec {
    version1 = "2.0.0";
    version2 = "2.0.2";

    # Rethinkdb 2.0.0
    rethinkDB200 = self.stdenv.lib.overrideDerivation self.rethinkdb (oldAttrs: {
      name = "rethinkdb-${version1}-1";
      patches = if self.stdenv.isDarwin then [ ./rethinkdb-2.0.0-1/sedDarwin.patch ] else null;
    });

    # Rethinkdb 2.0.2
    rethinkDB202 = self.stdenv.lib.overrideDerivation self.rethinkdb (oldAttrs: {
      name = "rethinkdb-${version2}-1";
      src = self.fetchurl {
        url = "http://download.rethinkdb.com/dist/rethinkdb-2.0.2.tgz";
        sha256 = "17ljxj1v38dsr4q1p1vxagxp15n1c4834fyhxk1fpf2izix60676";
      };
      patches = if self.stdenv.isDarwin then [ ./rethinkdb-2.0.0-1/sedDarwin.patch ] else null;
    });
  };
}