There is an updated pull request by mobinmob against master on the void-packages repository

https://github.com/mobinmob/void-packages texmacs
https://github.com/void-linux/void-packages/pull/14172

[WIP] New package: texmacs-1.99.11


A patch file from https://github.com/void-linux/void-packages/pull/14172.patch is attached