install mycfg stub along with the package

my/__init__.py

@@ -6,7 +6,7 @@ except ImportError:
     import warnings
     warnings.warn("mycfg package isn't found! That might result in issues")
 
-    from . import fake_mycfg as mycfg # type: ignore[no-redef]
+    from . import mycfg_stub as mycfg # type: ignore[no-redef]
     import sys
     sys.modules['mycfg'] = mycfg
     del sys

setup.py

@@ -23,7 +23,13 @@ def main():
         # package_dir={'': ''},
         packages=find_packages(),
         package_data={
-            'my': ['py.typed'],
+            'my': [
+                # for mypy
+                'py.typed',
+
+                # empty dir, necessary for proper dynamic imports
+                'mycfg_stub/repos/.gitkeep',
+            ],
         },
 
         python_requires='>=3.5', # depends on the modules though..

tox.ini

@@ -12,6 +12,7 @@ commands =
     # TODO ??
     # python -m pytest {posargs}
     python3 -c 'import my; print(my.__path__)'
+    python3 -c 'import my; import mycfg.repos' # shouldn't fail at least
     # TODO run demo.py? just make sure with_my is a bit cleverer?
     # TODO e.g. under CI, rely on installing