This seems to only affect me on Windows. Versioneer v.0.16.

At https://github.com/warner/python-versioneer/blob/master/src/git/from_vcs.py#L32 - the addition of the --match argument with the tag prefix causes versioneer to fail completely and return the version as 0+unknown. Removing these two arguments makes things work again.

Does this warrant some platform special casing? I'm happy to put a PR forward, but I don't have a feeling for the best way to address this issue.