GuixSD 1.5 amd64 (stock, and with guix pull && guix package -u)
I have initialized a system with the attached config.scm. The openssh service does not work at boot. However, I can reconfigure the system, and the openssh service works and allows connections. (I've confirmed with several people with same observation on #guix)
config.scm
Description: /etc/config.scm
