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

https://github.com/emacsomancer/void-packages mu1-4-12
https://github.com/void-linux/void-packages/pull/23850

mu: update to 1.4.12


A patch file from https://github.com/void-linux/void-packages/pull/23850.patch is attached