There is a new pull request by singul0 against master on the void-packages repository

https://github.com/singul0/void-packages cage-0.1.1
https://github.com/void-linux/void-packages/pull/14740

New package: cage-0.1.1
I tested it in TTY and as sway client

A patch file from https://github.com/void-linux/void-packages/pull/14740.patch is attached