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

https://github.com/CameronNemo/void-packages lxc-4.0.0
https://github.com/void-linux/void-packages/pull/20500

lxc: update to 4.0.0.
None

A patch file from https://github.com/void-linux/void-packages/pull/20500.patch is attached