ifneq (,$(filter eepreg,$(USEMODULE)))
  FEATURES_REQUIRED += periph_eeprom
endif

ifneq (,$(filter i2c_scan,$(USEMODULE)))
  FEATURES_REQUIRED += periph_i2c
endif

ifneq (,$(filter prng_fortuna,$(USEMODULE)))
  CFLAGS += -DCRYPTO_AES
endif