--- modules/db_berkeley/Makefile.orig	2015-07-20 13:16:25 UTC
+++ modules/db_berkeley/Makefile
@@ -24,7 +24,7 @@ ifeq ($(INSTALL_FLAVOUR),kamailio)
 # extra install for kamailio
 
 install-berkeley-scripts: $(bin_prefix)/$(bin_dir)
-		BERKELEYDBON=yes make -C ../../utils/kamctl/ install-modules
+		BERKELEYDBON=yes $(MAKE) -C ../../utils/kamctl/ install-modules
 
 install-scripts: install-berkeley-scripts