The default Etc/UTC is not in the tzdata list agama validates against,
so the load failed and the install fell through to agama defaults and
still reported completion. Normalize it and halt if the load fails.
prechroot.sh had setupssh.sh commented out and copied only the keys
inline, so nodes came up without shosts.equiv, without the CA in
ssh_known_hosts and without a setuid ssh-keysign.
While curl and agama download are happy with the CA bundle, zypper was not. Have pre.sh properly set up the CA certs.
Additionally, indicate the install subdirectory of the repository to agama via it's cmdline conf.