single file package compile result not included in wheel

[trim21]

I have a package with single py file in package as pkg/__init__.py and mypyc compile it to pkg.$tag.so, but it's not included in wheel.

I'll need to add extra file to pkg dir, for example pkg/_util.py to make mypyc compile normal ${hash}__mypyc.$tag.so file and get included in wheel.

example package: bangumi/wiki-parser-py@920c6e4

bgm_tv_wiki.cp310-win_amd64.pyd is not included