+
+You can use the `libdir` configuration option to add a directory to the
+search path. For example, if you set `libdir` to `/home/you/.ikiwiki/`,
+then ikiwiki will look for plugins in `/home/you/.ikiwiki/IkiWiki/Plugins`.
+
+Ikiwiki also supports plugins that are external programs. These are
+typically written in some other language than perl. Ikiwiki searches for
+these in /usr/lib/ikiwiki/plugins by default. If `libdir` is set, it will
+also look in that directory, for example in `/home/you/.ikiwiki/plugins`.