title: Why can't I install the css-lightbox compass plugin with gem install
body: <p>I am trying to install a compass plugin for css lightboxes <a href="https://github.com/ericam/compass-css-lightbox/blob/master/README.mkdn" rel="nofollow">compass-css-lightbox</a> but I am running into issues with gem install.</p>
  
  <pre><code>$sudo gem install css-lightbox
  
  Fetching: css-lightbox-0.2.0.gem (100%)
  Successfully installed css-lightbox-0.2.0
  Installing ri documentation for css-lightbox-0.2.0
  /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rdoc/rdoc.rb:280: warning: conflicting chdir during another chdir block
  /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rdoc/rdoc.rb:287: warning: conflicting chdir during another chdir block
  Done installing documentation for css-lightbox after 0 seconds
  1 gem installed
  
  compass install css-lightbox
  No such framework: "css-lightbox"
  </code></pre>