In [this latest routine](https://github.com/jaraco/jaraco.develop/blob/6469c7a61e7349b93f191df38eed6cd020dd79be/jaraco/develop/macos-build-python.py), on my macOS workstation with Homebrew installed locally, Python builds successfully with just a few outliers:

```
Python build finished successfully!
The necessary bits to build these optional modules were not found:
_gdbm                 ossaudiodev           spwd               
To find the necessary bits, look in setup.py in detect_modules() for the module's name.


The following modules found by detect_modules() in setup.py, have been
built by the Makefile instead, as configured by the Setup files:
_abc                  atexit                pwd                
time                                                           
```

The output is the same as on the system with Homebrew system-installed, except for `_gdbm`, which seems only to work on system-installed Homebrew.

That's much cleaner and addresses the reported issue. I guess I should have been more careful to execute exactly what the dev docs said rather than my routine which must have accumulated some cruft as you recognized.

Thanks for the help.

If you have any other hints as to how to ensure _gdbm builds, I'm open to suggestions. Thanks.