cucumber の新しいバージョンを無効にする方法、またはこれを以前のバージョンで動作させるにはどうすればよいですか?
user$ rake features
(in /Users/user/Project)
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby -I "/Library/Ruby/Gems/1.8/gems/cucumber-0.6.1/lib:lib" "/Library/Ruby/Gems/1.8/gems/cucumber- 0.6.1/bin/cucumber" --format pretty
can't activate cucumber (= 0.4.4, runtime) for [], already activated cucumber-0.6.1 for [] (Gem::LoadError)
/Library/Ruby/Site/1.8/rubygems.rb:280:in `activate'