Bootable systemd-nspawn container images built with mkosi from https://github.com/nspawn/mkosi-definitions. One repository per distribution release, named Distribution_Release; each image is published flat under that directory together with an unversioned link to the latest build and a signed SHA256SUMS. mkosi comes first in every path from the unpublished helper project system:systemd:nspawn:mkosi (an aggregate of system:systemd/mkosi); everything else comes from the distribution itself.