The setuptools_scm project is very cool, but it has two showstopping issues:

1. It limits us in how we bump version numbers according to SemVer. At least: I can't figure out how to e.g. change the minor version digit, not the patch version digit.
2. It causes errors, at least on my system, with missing _version.py files when trying to make a release.

I'd rather just have concrete manually managed versioning.