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

https://github.com/MattTreadwell/void-packages minecraft-legacy
https://github.com/void-linux/void-packages/pull/21944

New package: minecraft-legacy-1.6.93
As discussed in https://github.com/void-linux/void-packages/issues/13139, this will replace the existing the minecraft package and has proper licensing and versioning. 

A patch file from https://github.com/void-linux/void-packages/pull/21944.patch is attached