title: How can I resolve "Error: No developer directory found at /Developer"?
body: <p>I just upgraded XCode to 4.3.1.
  I'm using a script to build (and then deploy through Testflight) my app.
  But I now receive this error:</p>
  
  <blockquote>
    <p>Error: No developer directory found at /Developer. Run /usr/bin/xcode-select to update the developer directory path.</p>
  </blockquote>
  
  <p>I've no /Developer dir in my machine: how can I fix it?</p>