title: How to install plugins in sbt 0.11.2?
body: <p>I want to install <a href="http://lifty.github.com/" rel="noreferrer">Lifty</a>.</p>
  
  <p>I have created <code>c:\sbt\plugins\build.sbt</code> with the following single line:</p>
  
  <pre><code>addSbtPlugin("org.lifty" % "lifty" % "1.7.4")
  </code></pre>
  
  <p>When I execute <code>sbt lifty</code> in the project directory, I only get the following error:</p>
  
  <blockquote>
    <p>[error] Not a valid command: lifty</p>
  </blockquote>
  
  <p>How do I configure sbt for the plugin?</p>