# File lib/aruba/api.rb, line 281
    def use_clean_gemset(gemset)
      run_simple(%{rvm gemset create "#{gemset}"}, true)
      if all_stdout =~ /'#{gemset}' gemset created \((.*)\)\./
        gem_home = $1
        set_env('GEM_HOME', gem_home)
        set_env('GEM_PATH', gem_home)
        set_env('BUNDLE_PATH', gem_home)

        paths = (ENV['PATH'] || "").split(File::PATH_SEPARATOR)
        paths.unshift(File.join(gem_home, 'bin'))
        set_env('PATH', paths.uniq.join(File::PATH_SEPARATOR))

        run_simple("gem install bundler", true)
      else
        raise "I didn't understand rvm's output: #{all_stdout}"
      end
    end