title: Pip installs to wrong directory
body: <p>I'm on OS X and my Pip installs to </p>
  
  <pre><code>/Library/Python/2.7/site-packages
  </code></pre>
  
  <p>I would like my pip to install to:</p>
  
  <pre><code>/usr/local/lib/python2.7/site-packages
  </code></pre>
  
  <p>How could I achieve this? I haven't found a way yet </p>