Package upload (v0.1.14) fails because of unresolved dependencies in private submodule helper script

[hf-kklein]

type_check run-test: commands[2] | mypy --show-error-codes tests/integration_tests
tests/integration_tests/edifact-templates/extract_all_conditions_from_ahbs.py:10: error: Cannot find implementation or library stub for module named "ahbicht.mapping_results" [import]
tests/integration_tests/edifact-templates/extract_all_conditions_from_ahbs.py:10: note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#missing-imports
Found 1 error in 1 file (checked 16 source files)
ERROR: InvocationError for command /home/runner/work/mig_ahb_utility_stack/mig_ahb_utility_stack/.tox/type_check/bin/mypy --show-error-codes tests/integration_tests (exited with code 1)
___________________________________ summary ____________________________________
unit_tests: commands succeeded
integration_tests: commands succeeded
linting: commands succeeded
coverage: commands succeeded
ERROR: type_check: commands failed

I don't get it. Why does the usual CI just pass but the upload behaves differently?
There are in fact unresolved (ahbicht) dependencies in the script mentioned above but they shouldn't let the package build fail.

https://github.com/Hochfrequenz/mig_ahb_utility_stack/runs/6796916740?check_suite_focus=true#step:5:175

[hf-kklein]

fixed with #118 and #119