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

https://github.com/ifreund/void-packages zig-clang-dep
https://github.com/void-linux/void-packages/pull/21838

zig: add clang to makedepends
zig also links against clang, which was automatically included as a
dependency of llvm10 (which it shouldn't be) masking the fact that it's
needed in makedepends.

A patch file from https://github.com/void-linux/void-packages/pull/21838.patch is attached