(FAQ says to send bug reports to the debian-backports mailing list; so
I'm doing so since it hasn't been sent here. Also cc'ing someone else's
report in the BTS).
# certbot
Traceback (most recent call last):
File "/usr/bin/certbot", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2876, in
<module>
working_set = WorkingSet._build_master()
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 451, in
_build_master
return cls._build_from_requirements(__requires__)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 464, in
_build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 639, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: psutil>=2.2.1
Neither Jessie nor Jessie-backports has a new enough python-psutil, even
if the versioned Depends: were not missing.
This makes me think you have accidentally forgotten to test your
backport on a Jessie system or, alternatively, your Jessie system is not
"clean".
PS: You probably need a versioned Depends: in unstable too, since the
too-old version is part of stable.
