diff -Nru dclock-2.2.2/debian/rules dclock-2.2.2/debian/rules
--- dclock-2.2.2/debian/rules	2019-01-09 21:52:03.000000000 +0000
+++ dclock-2.2.2/debian/rules	2019-01-09 21:52:03.000000000 +0000
@@ -12,7 +12,7 @@
 
 override_dh_auto_build:
 	xmkmf
-	$(MAKE) CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" \
+	dh_auto_build -- CPPFLAGS="$(CPPFLAGS)" CFLAGS="$(CFLAGS)" \
 		CXXFLAGS="$(CXXFLAGS)" LDFLAGS="$(LDFLAGS)"
 
 override_dh_install: