With Python 3.12 and warnings enabled, the openpgp.py code in gemato generates a DeprecationWarning. This can e.g. be tested with emerge --sync: PYTHONWARNINGS=d emerge --sync -q Warning: /usr/lib/python3.12/site-packages/gemato/openpgp.py:171: DeprecationWarning: datetime.datetime.utcfromtimestamp() is deprecated and scheduled for removal in a future version. Use timezone-aware objects to represent datetimes in UTC: datetime.datetime.fromtimestamp(timestamp, datetime.UTC). return datetime.datetime.utcfromtimestamp(int(ts)) This command will also show a warning about portage's code itself, this is tracked in #934226