jail creation question

Hi,

When poudriere creates a jail, where does it put the .obj files?
Do they remain after the build completes?

The jail creation is like this:

poudriere jail -c -j 141R-amd64 -J32 -m git+https -v releng/14.1

This is on a -current host. I'd not expect it to write to /usr/obj
on the host.
--