如何在1.9.2上安装SystemTimer ?

I've just upgraded my app from 1.8.7 to 1.9.2 using RVM and had to add RubyGems and Bundler, ran bundle install and got everything to work except SystemTimer. Google-fu returns nothing and I see others have had issue with it in 1.9 but some have gotten it to work. Any ideas?I've just upgraded my app from 1.8.7 to 1.9.2 u