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

https://github.com/sgn/void-packages gmic-cleanup
https://github.com/void-linux/void-packages/pull/34093

gmic: fix license, clean do_build
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#### Testing the changes
- I tested the changes in this PR: **NO**

@newbluemoon 

A patch file from https://github.com/void-linux/void-packages/pull/34093.patch is attached