title: Can't install libapache2-mod-passenger for Apache 2.4?
body: <p>I'm currently using <a href="https://www.phusionpassenger.com/library/walkthroughs/deploy/ruby/ownserver/apache/oss/trusty/install_passenger.html" rel="nofollow">https://www.phusionpassenger.com/library/walkthroughs/deploy/ruby/ownserver/apache/oss/trusty/install_passenger.html</a> to install Passenger on Ubuntu 12.04 running Apache 2.4.16.</p>
  
  <pre><code># sudo apt-get install -y libapache2-mod-passenger
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Some packages could not be installed. This may mean that you have
  requested an impossible situation or if you are using the unstable
  distribution that some required packages have not yet been created
  or been moved out of Incoming.
  The following information may help to resolve the situation:
  
  The following packages have unmet dependencies:
   libapache2-mod-passenger : Depends: apache2-mpm-worker (&gt;= 2.2.9-9) but it is not going to be installed or
                                       apache2-mpm-prefork (&gt;= 2.2.9-9) but it is not going to be installed or
                                       apache2-mpm-itk (&gt;= 2.2.9-9) but it is not going to be installed or
                                       apache2-mpm-event (&gt;= 2.2.9-9) but it is not going to be installed
  E: Unable to correct problems, you have held broken packages.
  </code></pre>