Poudriere hooks?

[Patrick Gibson]

Is there any way to run a hook within a jail when doing a bulk build? We
use the enterprise version of Phusion Passenger (www/rubygem-passenger),
and I have a script to download the source from Phusion into the distfiles
directory, and patch the port to use the modified version. But as we're
moving to a Poudriere-based build system, I haven't figured out a good way
to do this within the jailed environment during a bulk build.