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

https://github.com/schmidh/void-packages numactl-devel
https://github.com/void-linux/void-packages/pull/15888

numactl: add devel file system link to support devel subpackage
devel subpackage already defined. Just the file system link is missing.

A patch file from https://github.com/void-linux/void-packages/pull/15888.patch is attached