will scan the distfiles folder,
<varname>DISTFILES_CACHE
</varname> in
<filename>poudriere.conf
</filename>, versus the ports tree given by the
<literal>-p
<replaceable>portstree
</replaceable></literal> argument and prompt for removal of those distfiles. To skip the prompt and remove all unused files unconditionally, the
<literal>-y
</literal> argument can be added: