# File lib/guard/notifiers/gntp.rb, line 60
      def available?(silent = false, options = {})
        if RbConfig::CONFIG['host_os'] =~ /darwin|linux|freebsd|openbsd|sunos|solaris|mswin|mingw|cygwin/
          require 'ruby_gntp'
          true

        else
          ::Guard::UI.error 'The :gntp notifier runs only on Mac OS X, Linux, FreeBSD, OpenBSD, Solaris and Windows.' unless silent
          false
        end

      rescue LoadError
        ::Guard::UI.error "Please add \"gem 'ruby_gntp'\" to your Gemfile and run Guard with \"bundle exec\"." unless silent
        false
      end