glfs/postlfs/security/iptables/iptables-exp.xml

<sect2>
<title>Command explanations</title>

<para><parameter>PREFIX=/usr</parameter>: Compiles and installs 
<application>iptables</application> into the 
<filename class="directory">/usr</filename> hierarchy instead of 
<filename class="directory">/usr/local</filename>.</para>

</sect2>