diff --git a/kernel/Makefile b/kernel/Makefile
index 0398a281..124b945c 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -14,7 +14,7 @@ $(if $(O),,$(error Specify the compilation target directory))
 $(if $(shell ls $(AALBASE)/Makefile),,\
 	$(error AAL is not found in $(AALBASE)))
 
-.PHONY: all clean
+.PHONY: all clean depend
 
 all: $(KERNELS)
 
@@ -28,6 +28,7 @@ all: $(KERNELS)
 	@echo 'AALBASE = $(AALBASE)' >> $@
 	@echo 'TARGET = $(notdir $(patsubst %/,%,$(dir $@)))' >> $@
 	@cat Makefile.build >> $@
+	@rm -f $(dir $@)/Makefile.dep
 
 clean: $(addsuffix .clean,$(BUILD_TARGET))
 
diff --git a/kernel/Makefile.build b/kernel/Makefile.build
index 3f9e554b..dacd1f81 100644
--- a/kernel/Makefile.build
+++ b/kernel/Makefile.build
@@ -30,11 +30,12 @@ clean:
 
 depend: Makefile.dep
 
-Makefile.dep: $(DEPSRCS)
-	$(dep_cmd)
+Makefile.dep:
+	$(call dep_cmd,$(DEPSRCS))
 
 $(AALOBJ): FORCE
 	@mkdir -p $(dir $(AALOBJ))
+	$(call echo_cmd,BUILD AAL,$(TARGET))$(submake) -C $(AALBASE) $(SUBCMD_OPTS) prepare
 	$(call echo_cmd,BUILD AAL,$(TARGET))$(submake) -C $(AALBASE) $(SUBCMD_OPTS)
 
 %.o: $(SRC)/%.c