现在我尝试使用bowline开发桌面应用程序，ruby。
我使用了ruby 1.9.2。我成功安装了bowline gem。我使用“bowline-gen app helloworld”创建了一个应用程序。然后我运行了bowline-bundle。但是它会产生一些错误。
/home/users/shamith/.rvm/gems/ruby-1.9.2-p290/gems/bowline-bundler-0.0.4/lib/bowline/bundler/dependency.rb:59:in {{1}类<class:Dependency>': undefined method'的version_requirements'
来自/home/users/shamith/.rvm/gems/ruby-1.9.2-p290/gems/bowline-bundler-0.0.4/lib/bowline/bundler/dependency.rb:1:in Bundler::Dependency' (NameError)
from /home/users/shamith/.rvm/gems/ruby-1.9.2-p290/gems/bowline-bundler-0.0.4/lib/bowline/bundler/dependency.rb:4:in要求“
来自/home/users/shamith/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in <top (required)>'
from /home/users/shamith/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in'
来自/home/users/shamith/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in require'
from /home/users/shamith/.rvm/gems/ruby-1.9.2-p290/gems/bowline-bundler-0.0.4/lib/bowline/bundler.rb:18:in require'
来自/home/users/shamith/.rvm/gems/ruby-1.9.2-p290/gems/bowline-bundler-0.0.4/bin/bowline-bundle:4:in require'
from /home/users/shamith/.rvm/rubies/ruby-1.9.2-p290/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in load'
请帮我解决一下