_________________ tests/samples/hello-cython/hello/__init__.py _________________
 error: Duplicate module named "hello" (also at "tests/samples/issue-274-support-one-package-without-package-dir/hello/__init__.py")
 note: See https://mypy.readthedocs.io/en/stable/running_mypy.html#mapping-file-paths-to-modules for more info
 note: Common resolutions include: a) using `--exclude` to avoid checking one of them, b) adding `__init__.py` somewhere, c) using `--explicit-package-bases` or adjusting MYPYPATH