-sudo test -f /etc/postfix/$local_domainname/smtpd/x509/key.pem ||
-printf '%s\n' "$(tput rev)run before: remote/runit-configure dovecot$(tput sgr0)" && exit 1
+hint="run before: remote/runit-configure $sv"
+assert 'sudo test -f /etc/postfix/$local_domainname/smtpd/x509/key.pem' hint
sudo debconf-set-selections <<-EOF
postfix postfix/main_mailer_type select No configuration