Comment 4 for bug 1884848

Well, this is not a usr-merge bug per-se, but just a bug that usr-merge actually fixes for people.

iptables in focal has moved from /sbin/iptables to /usr/sbin/iptables. The hardcoded path in sshguard.service was not updated, and thus is broken. usr-merged systems do not experience this issue, because any binary is accesible from either / or /usr prefix.