There is a new pull request by ndowens against master on the void-packages repository

https://github.com/ndowens/void-packages python-msgpack
https://github.com/void-linux/void-packages/pull/16041

python-msgpack: update to 0.6.2
python tests completed fine

A patch file from https://github.com/void-linux/void-packages/pull/16041.patch is attached