Wow! That is a pretty bad oversight and you're entirely right that this cannot be allowed to build the way it is. I'll push an update soon.
I wonder, why it actually built successfully for me though, every single time I ever build it! :/ musl does try to reduce incompatibilities with glibc ABI, but without any guarantees... but we're both building for x86_64 so we "should" be getting the same results. Weird.
Pinned Comments
Morganamilo commented on 2022-02-20 18:30 (UTC)
There's now a custom repo and binaries again. Though only for x86_64 currently.
Custom Repo
Pre compiled binaries
https://pkgbuild.com/~morganamilo/pacman-static/x86_64/bin/