title: Bundle install broken on ruby 2.0 upgrade
body: <p>Just upgraded to ruby 2.0/rails 4.0 and trying to run bundle install on a new rails project. Whenever it hits something that's not already installed, it'll spit out:</p>
  
  <pre><code>Installing coffee-rails (4.0.0.beta1) 
  Errno::ENOENT: No such file or directory - /usr/lib/ruby/gems/2.0.0/build_info/coffee-rails-4.0.0.beta1.info
  An error occurred while installing coffee-rails (4.0.0.beta1), and Bundler cannot continue.
  Make sure that `gem install coffee-rails -v '4.0.0.beta1'` succeeds before bundling.
  </code></pre>
  
  <p>So then I then run</p>
  
  <pre><code>gem install coffee-rails -v '4.0.0.beta1'
  </code></pre>
  
  <p>And it installs fine, and I rerun bundle install and have to repeat this for every time it runs into a gem version I haven't installed yet. What's the problem here?</p>