<chapter xmlns="http://docbook.org/ns/docbook"
        xmlns:xlink="http://www.w3.org/1999/xlink"
        xmlns:xi="http://www.w3.org/2001/XInclude"
        version="5.0"
        xml:id="sec-release-14.12">

<title>Release 14.12 (“Caterpillar”, 2014/12/??)</title>

<para>When upgrading from a previous release, please be aware of the
following incompatible changes:

<itemizedlist>

  <listitem><para>The default version of Apache httpd is now 2.4. If
  you use the <option>extraConfig</option> option to pass literal
  Apache configuration text, you may need to update it — see <link
  xlink:href="http://httpd.apache.org/docs/2.4/upgrading.html">Apache’s
  documentation</link> for details. If you wish to continue to use
  httpd 2.2, add the following line to your NixOS configuration:

<programlisting>
services.httpd.package = pkgs.apacheHttpd_2_2;
</programlisting>

  </para></listitem>

  <listitem><para>PHP 5.3 has been removed because it is no longer
  supported by the PHP project. A <link
  xlink:href="http://php.net/migration54">migration guide</link> is
  available.</para></listitem>

  <listitem><para>The host side of a container virtual Ethernet pair
  is now called <literal>ve-<replaceable>container-name</replaceable></literal>
  rather than <literal>c-<replaceable>container-name</replaceable></literal>.</para></listitem>

  <listitem><para>GNOME 3.10 support has been dropped. The default GNOME version is now 3.12.</para></listitem>

</itemizedlist>

</para>

</chapter>
