There is an updated pull request by cinerea0 against master on the void-packages repository

https://github.com/cinerea0/void-packages greetd
https://github.com/void-linux/void-packages/pull/36552

greetd: set shell for agreety
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#### Testing the changes
- I tested the changes in this PR: **briefly**

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Closes #35870.

A patch file from https://github.com/void-linux/void-packages/pull/36552.patch is attached