title: fatal error: libxml/tree.h: No such file or directory libxml/tree.h. In cyrus-imapd
body: <p>When I run the make of <em>cyrus-imapd-2.4.17-caldav-beta9</em> get the following error:</p>
  
  <pre><code>In file included from httpd.c:68:0:
  httpd.h:48:25: fatal error: libxml/tree.h: No such file or directory
  compilation terminated.
  </code></pre>
  
  <p>I'm trying to install this beta version that supports calendars.</p>
  
  <p>I have installed libxml2-dev.</p>
  
  <pre><code>apt-get install libxml2-dev
  </code></pre>
  
  <p>My operating system is Debian 7.</p>
  
  <p>What am I forgetting?</p>
  
  <p>Thanks.</p>