title: Future is not a member of scala.concurrent
body: <p>I'm getting the error <code>Future is not a member of scala.concurrent</code> when importing the <code>Future</code> class.</p>
  
  <pre><code>~/workspace/experiments $ scala
  Welcome to Scala version 2.9.2 (OpenJDK 64-Bit Server VM, Java 1.7.0_151).
  Type in expressions to have them evaluated.
  Type :help for more information.
  
  scala&gt; import scala.concurrent.Future
  &lt;console&gt;:7: error: Future is not a member of scala.concurrent
         import scala.concurrent.Future
                ^
  
  scala&gt;
  </code></pre>
  
  <p>I'm running this on Ubuntu 14.04:</p>
  
  <pre><code>~/workspace/experiments $ cat /etc/lsb-release                                                 
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=14.04
  DISTRIB_CODENAME=trusty
  DISTRIB_DESCRIPTION="Ubuntu 14.04.5 LTS"
  </code></pre>
  
  <p>Does any one know what I'm doing wrong?</p>