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

lv2: do not makedepend on gtk2
https://github.com/void-linux/void-packages/pull/50644

Description:
Drop the dependence on `gtk`, see https://gitlab.com/lv2/lv2/-/issues/57

- I tested the changes in this PR: yes

@slimjimsoftware Can you also check this does not break audio in asahi?