On Tue, Apr 19, 2016 at 10:25:41AM +0200, Holger Levsen wrote: > $ diffoscope piuparts_0.70_source.changes piuparts_0.70~bpo8+1_source.changes > Traceback (most recent call last): > File "/usr/bin/diffoscope", line 5, in <module> > from pkg_resources import load_entry_point > File "/usr/lib/python3/dist-packages/pkg_resources.py", line 2876, in > <module> > working_set = WorkingSet._build_master() > File "/usr/lib/python3/dist-packages/pkg_resources.py", line 449, in > build_master > ws.require(__requires__) > File "/usr/lib/python3/dist-packages/pkg_resources.py", line 745, in require > needed = self.resolve(parse_requirements(requirements)) > File "/usr/lib/python3/dist-packages/pkg_resources.py", line 639, in resolve > raise DistributionNotFound(req) > pkg_resources.DistributionNotFound: python-magic
As Mattia found out, this is because the requires.txt of the backported diffoscope is non-empty. It contains the lines: > python-magic > libarchive-c ... which are the dependencies listed in setup.py as install_requires. On unstable, those lines are _also_ in requires.txt _before_ dh_python3 runs. After it runs, it got cleaned up and the file is empty. I saw in the changelog of dh-python that cleaning this file up is a recent change [1], which explains why dh-python in stable behaves differently. There it simply doesn't clean up requires.txt. [1]: https://tracker.debian.org/media/packages/d/dh-python/changelog-2.20151103
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