Fix systemd service defintion installation

debian/rules

@@ -20,7 +20,7 @@ override_dh_auto_install:
 	install -m 640 -D $(CURDIR)/debian/ngircd.motd \
 	    $(CURDIR)/debian/ngircd/etc/ngircd/ngircd.motd
 	install -m 640 -D $(CURDIR)/contrib/ngircd.service \
-	    $(CURDIR)/lib/systemd/system/ngircd.service
+	    $(CURDIR)/debian/ngircd/lib/systemd/system/ngircd.service
 	# make lintian happy
 	rm $(CURDIR)/debian/ngircd/usr/share/doc/ngircd/COPYING
 	mv $(CURDIR)/debian/ngircd/usr/share/doc/ngircd/ChangeLog \