Index: en_US.ISO8859-1/books/handbook/ports/chapter.xml
===================================================================
--- en_US.ISO8859-1/books/handbook/ports/chapter.xml
+++ en_US.ISO8859-1/books/handbook/ports/chapter.xml
@@ -1713,7 +1713,8 @@
        jails, and from different port trees.  Custom configurations
        for these combinations are called <emphasis>sets</emphasis>.
        See the CUSTOMIZATION section of &man.poudriere.8; for
-       details.</para>
+       details once <package>ports-mgmt/poudriere</package>
+       or <package>ports-mgmt/poudriere-devel</package> is installed.</para>
 
       <para>The basic configuration shown here puts a single jail-,
        port-, and set-specific <filename>make.conf</filename> in