-install/$(THISHOST): exim4-$(call host-mode,$(THISHOST)).conf
- $(ROOT) install -m644 $< /etc/exim4/exim4.conf
- $(ROOT) service exim4 reload
+install_rune = \
+ exim4 -C/etc/exim4/exim4.conf.new -bV >/dev/null && \
+ mv /etc/exim4/exim4.conf.new /etc/exim4/exim4.conf && \
+ service exim4 reload