sergey-safarov left a comment (kamailio/kamailio#4241)
Quick question regarding make apk and abuild -r
`make apk` - download kamailio sources, evaluate `sha256` and injecting into `abuild` scripts.
https://github.com/kamailio/kamailio/blob/master/pkg/kamailio/Makefile#L30-L...
`abuild -r` - trigger packages compilation for Alpine Linux. Yes, it is a Alpine linux specific tool. It is line `rpmbuild` utility for rpm based dists.
I will try to prepare the Alpine script using what you recommended.