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

https://github.com/ndowens/void-packages xdot
https://github.com/void-linux/void-packages/pull/26931

xdot: update to 1.2.
Add python3-numpy to depends as xdot fails to launch w/o

A patch file from https://github.com/void-linux/void-packages/pull/26931.patch is attached