ifneq ($(RTOS),)
ifneq ($(wildcard $(NUCLEI_SDK_RTOS)),)
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.rtos
MAKEFILE_PREREQS += $(NUCLEI_SDK_BUILD)/Makefile.rtos.$(RTOS)
include $(NUCLEI_SDK_BUILD)/Makefile.rtos.$(RTOS)
endif
endif