title: Unable to activate susy-2.1.1, because sass-3.2.17 conflicts with sass (~> 3.3.0)
body: <p>I have installed the latest versions of compass, sass and susy. But still I am getting this error:</p>
  
  <pre><code>Unable to activate susy-2.1.1, because sass-3.2.17 conflicts with sass (~&gt; 3.3.0)
  </code></pre>
  
  <p>Anyone knows how this Ruby thing works?</p>
  
  <p>This is the list of my installed gems:</p>
  
  <pre><code>*** LOCAL GEMS ***
  
  CFPropertyList (2.2.0)
  chunky_png (1.3.0)
  compass (0.12.4)
  compass-core (1.0.0.alpha.19)
  compass-import-once (1.0.4)
  compass-rails (1.1.3)
  fssm (0.2.10)
  libxml-ruby (2.6.0)
  multi_json (1.9.2)
  nokogiri (1.5.6)
  rb-fsevent (0.9.4)
  rubygems-update (2.2.2)
  sass (3.3.4, 3.3.3, 3.2.17)
  sqlite3 (1.3.7)
  susy (2.1.1)
  </code></pre>