There's a closed pull request on the void-packages repository

[no merge] darktable: update to 3.0.0.
https://github.com/void-linux/void-packages/pull/17787

Description:
Since this is a rather huge upgrade to darktable and version `3.0.1` is probably not too far out, I'd like to wait until then. So this is PR is more or less a placeholder and the first test if this builds everywhere.