The packages are stuck on py3.6 which means they will be pain once we switch to 3.7. Please test them on 3.7 *and* 3.8 (so we don't to revisit this in a few months), and update PYTHON_COMPAT appropriately. If it doesn't work, please either fix it, remove Python or issue last rites. Please consider this urgent.
Since nose is dead, I'd suggest lastriting it if you don't really need it.
tracking removal in #718996
*** This bug has been marked as a duplicate of bug 718996 ***