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

https://github.com/terminaldweller/void-packages master
https://github.com/void-linux/void-packages/pull/42193

added mixmaster as a build option to the neomutt template
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#### Testing the changes
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A patch file from https://github.com/void-linux/void-packages/pull/42193.patch is attached