Index: buildsys.mk.in
==================================================================
--- buildsys.mk.in
+++ buildsys.mk.in
@@ -74,11 +74,11 @@
 .SUFFIXES: .beam .c .cc .cxx .d .erl .m
 .PHONY: all subdirs depend install uninstall clean distclean
 
 all:
 	for i in subdirs depend ${OBJS} ${STATIC_LIB} ${STATIC_LIB_NOINST} ${LIB} ${LIB_NOINST} ${PLUGIN} ${PLUGIN_NOINST} ${PROG} ${PROG_NOINST}; do \
-		${MAKE} ${MFLAGS} $$i; \
+		${MAKE} ${MFLAGS} $$i || exit 1; \
 	done
 
 subdirs:
 	for i in ${SUBDIRS}; do \
 		${DIR_ENTER}; \