When run, it fails with
'import site' failed
debug: OperationError:
debug: operror-type: ModuleNotFoundError
debug: operror-value: No module named '_pypy_generic_alias'
pypy.exe, python3.exe and all other python-ish exes in the directory work identically, only python.exe fails. Why? Is it somehow special? How are you supposed to set up your environment to use it and why?