# File lib/rubygems.rb, line 459
    def default_dir
      if defined? RUBY_FRAMEWORK_VERSION
        return File.join(File.dirname(Config::CONFIG["sitedir"]), "Gems")
      else
        gemdir = File::expand_path(File::join(Config::CONFIG["sitedir"],"..","gems"))

        File.join(gemdir, Config::CONFIG['ruby_version'])
      end
    end