Posted by Nick Sieger Wed, 24 Feb 2010 03:58:00 GMT Synopsis jruby -S rails new myapp -m http://jruby.org/rails3.rb When creating your Rails 3 application, just add the JRuby-specific template (-m http://jruby.org/rails3.rb). Details $ jruby -S gem install rails --pre --no-rdoc --no-ri Due to a rubygems bug, you must uninstall all older versions of bundler for 0.9 to work Successfully installed i1