Looks like it's a python bug: https://github.com/python/cpython/issues/91257
- Bug#1011793: python-ecdsa: FTBFS: dh_auto_test:... Lucas Nussbaum
- Bug#1011793: Andreas Hasenack
- Bug#1011793: Andreas Hasenack
- Bug#1011793: closing 1011793 Timo Röhling
- Processed: closing 1011793 Debian Bug Tracking System
