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

https://github.com/zdykstra/void-packages xdm
https://github.com/void-linux/void-packages/pull/20497

xdm: depend on xsm
Sister commit to https://github.com/void-linux/void-packages/pull/20444

A patch file from https://github.com/void-linux/void-packages/pull/20497.patch is attached