# File lib/generators/cucumber/install/install_base.rb, line 146
      def detect_default_driver
        @default_driver = first_loadable([['capybara', :capybara], ['webrat', :webrat]])
        raise "I don't know which driver you want. Use --capybara or --webrat, or gem install capybara or webrat." unless @default_driver
        @default_driver
      end