This image is an x86_64 image, and so it spits out the artifacts in
/packages/artists/x86_64
Ideally we'd want the architecture to be independent,
so a program like mrtest could automatically grab the right packages.
abuild has an environment variable we can tweak for noarch package placement.
Does apk have a directory that it searches for noarch packages?
(maybe "all"? -- https://dl-cdn.alpinelinux.org/alpine/edge/community/all/)
Alternatively, we could create the symlinks for supported systems,
so a program consuming the artifacts would know what is supported.