autopkgtest failure with python 3.12

Job #6076461851 failed for 9efad82a:

autopkgtest [19:24:47]: test autodep8-python3: set -e ; for py in $(py3versions -r 2>/dev/null) ; do cd "$AUTOPKGTEST_TMP" ; echo "Testing with $py:" ; $py -c "import cipheycore; print(cipheycore)" ; done
autopkgtest [19:24:47]: test autodep8-python3: [-----------------------
Testing with python3.12:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/cipheycore/__init__.py", line 10, in <module>
    from . import _ciphey_core_py
ImportError: cannot import name '_ciphey_core_py' from partially initialized module 'cipheycore' (most likely due to a circular import) (/usr/lib/python3/dist-packages/cipheycore/__init__.py)