Culerity, Cucumber and Couchapp

Starting a new couchapp application I want to try BDD. I found a small tutorial how to testing couchapps with cucumber and culerity. Unfortunatly I have to deal with WinXP, and so I run into some trouble because the culerity server doesn't start. Finally I can solve it by insert "jruby " in culerity-0.2.10/lib/culerity.rb, line 28.

Before:

def self.run_server
   IO.popen(File.dirname(__FILE__) + "/../bin/run_celerity_server.rb", 'r+').extend(ServerCommands)
end

After:

def self.run_server
   IO.popen("jruby " + File.dirname(__FILE__) + "/../bin/run_celerity_server.rb", 'r+').extend(ServerCommands)
end