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

https://github.com/mobinmob/void-packages flacon
https://github.com/void-linux/void-packages/pull/37034

flacon: update to 9.0.0.
Also:
- add taglib-devel to makedepends (new upstream default dep).

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@travankor

A patch file from https://github.com/void-linux/void-packages/pull/37034.patch is attached