How to see errors with poudriere?

[J David]

We are rapidly converting all of our ports-building infrastructure to
poudriere, which is a fantastic tool and has been a huge improvement for us.

However, I do run across the occasional stubborn ports that refuse to build
(example: lang/ghc) under poudriere, and I'm not sure how to debug this.

I am pretty sure this is possible/easy and I'm just being stupid.  If
anyone would mind giving me a shove in the right direction, I would really
appreciate it.

Thanks!