The project metadata for poetry does not include dependencies on "lockfile" and "pip", but it does not work correctly without them. So, this is missing from the python3-poetry sub-package and have to be added manually: Requires: python3-lockfile Requires: python3-pip (I will fix this after the python 3.8 rebuild is done, so I don't mess things up.)
If you push and build this before the Python 3.8 commit, you won't mess things up.