Use +override_dh_installsystemd to install service files instead of varnish.install

debian/compat

-10
+11

debian/rules

@@ -39,7 +39,7 @@ VARNISHD_VRT = $(shell \
 
 # Main build rule, leave everything to debhelper
 %:
-	dh $@ --parallel --with systemd
+	dh $@ --parallel
 
 ifeq (,$(filter test,$(LOCAL_BUILD_OPTIONS)))
 # Disable automated build tests
@@ -83,13 +83,10 @@ override_dh_gencontrol:
 		dh_gencontrol -- -Tdebian/substvars; \
 	fi
 
-override_dh_systemd_enable:
-	dh_systemd_enable -pvarnish --name=varnish varnish.service
-	dh_systemd_enable -pvarnish --no-enable varnishncsa.service
 
-override_dh_systemd_start:
-	dh_systemd_start -pvarnish varnish.service
-	dh_systemd_start -pvarnish --no-start varnishncsa.service
+override_dh_installsystemd:
+	dh_installsystemd
+	dh_installsystemd --name varnishncsa --no-enable --no-start
 
 override_dh_compress:
 	dh_compress -X/usr/share/doc/varnish-doc/html

debian/varnish.install

@@ -5,7 +5,6 @@ usr/lib/varnish
 usr/share/man
 usr/share/varnish/vcc
 usr/share/varnish/vcl
-debian/*.service lib/systemd/system/
 usr/share/doc/varnish/*.vcl
 # from libvarnishapi1
 usr/lib/lib*.so*