diff --git a/examples/sotest/lib/Makefile b/examples/sotest/lib/Makefile
index 0b6933273..c402b967c 100644
--- a/examples/sotest/lib/Makefile
+++ b/examples/sotest/lib/Makefile
@@ -52,16 +52,16 @@ ROMFS_HDR = $(LIB_DIR)/romfs.h
 SYMTAB_SRC = $(LIB_DIR)/sot_symtab.c
 
 define DIR_template
-$(1)_$(2):
+$(1)_$(2): $(4)
 	+$(Q) $(MAKE) -C $(1) $(3) TOPDIR="$(TOPDIR)" APPDIR="$(APPDIR)" FSROOT_DIR="$(FSROOT_DIR)" CROSSDEV=$(CROSSDEV)
 endef
 
 all: $(ROMFS_HDR) $(DIRLIST_HDR) $(SYMTAB_SRC)
 .PHONY: all build clean install populate
 
-$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),build, all)))
-$(foreach DIR, $(ALL_SUBDIRS), $(eval $(call DIR_template,$(DIR),clean,clean)))
-$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),install,install)))
+$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),build,all,)))
+$(foreach DIR, $(ALL_SUBDIRS), $(eval $(call DIR_template,$(DIR),clean,clean,)))
+$(foreach DIR, $(BUILD_SUBDIRS), $(eval $(call DIR_template,$(DIR),install,install,$(DIR)_build)))
 
 # Build program(s) in each sud-directory