gem install autotest-fsevent ----- FAILED on Windows XP

I have installed growl on Windows XP It looks like the software only support Mac OS, how to solve the problem on Windows XP? Thank you.

$ gem install autotest-fsevent -v 0.2.4 Building native extensions. This could take a while... ERROR: Error installing autotest-fsevent:         ERROR: Failed to build gem native extension.

        /usr/bin/ruby.exe extconf.rb extconf.rb:19: Only Darwin (Mac OS X) systems are supported (RuntimeError)

Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/autotest-fsevent-0.2.4 for inspection. Results logged to /usr/lib/ruby/gems/1.8/gems/autotest-fsevent-0.2.4/ext/fsevent/gem_make.out

Problem has been resolved.

Please ignore the post regarding gem install autotest-fsevent ----- FAILED on Windows XP

How did you resolve your problem? I am getting the same error on Windows 8.1 when trying to do a 'bundle install'.