<chapter xmlns="http://docbook.org/ns/docbook"
         xmlns:xlink="http://www.w3.org/1999/xlink"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         xml:id="chap-hooks">
 <title>Hooks reference</title>
 <para>
  Nixpkgs has several hook packages that augment the stdenv phases.
 </para>
 <xi:include href="./postgresql-test-hook.section.xml" />
</chapter>