ifneq ($(strip $(DROP_ALT)), yes)
    SRC += drashna.c \
    process_records.c

    ifneq ($(PLATFORM),CHIBIOS)
        LTO_ENABLE        = yes
    endif
    SPACE_CADET_ENABLE    = no
    GRAVE_ESC_ENABLE      = no

    ifneq ($(strip $(NO_SECRETS)), yes)
        ifneq ("$(wildcard $(USER_PATH)/secrets.c)","")
            SRC += secrets.c
        endif
        ifeq ($(strip $(NO_SECRETS)), lite)
            OPT_DEFS += -DNO_SECRETS
        endif
    endif

    ifeq ($(strip $(TAP_DANCE_ENABLE)), yes)
        SRC += tap_dances.c
    endif
    
    ifeq ($(strip $(RGBLIGHT_ENABLE)), yes)
        SRC += rgb_stuff.c
        ifeq ($(strip $(INDICATOR_LIGHTS)), yes)
            OPT_DEFS += -DINDICATOR_LIGHTS
        endif
        ifeq ($(strip $(RGBLIGHT_TWINKLE)), yes)
            OPT_DEFS += -DRGBLIGHT_TWINKLE
        endif
        ifeq ($(strip $(RGBLIGHT_NOEEPROM)), yes)
            OPT_DEFS += -DRGBLIGHT_NOEEPROM
        endif
        ifeq ($(strip $(RGBLIGHT_STARTUP_ANIMATION)), yes)
            OPT_DEFS += -DRGBLIGHT_STARTUP_ANIMATION
        endif
    endif

    RGB_MATRIX_ENABLE ?= no
    ifneq ($(strip $(RGB_MATRIX_ENABLE)), no)
        SRC += rgb_matrix_stuff.c
    endif


    ifdef CONSOLE_ENABLE
        ifeq ($(strip $(KEYLOGGER_ENABLE)), yes)
            OPT_DEFS += -DKEYLOGGER_ENABLE
        endif
    endif

    ifeq ($(strip $(MAKE_BOOTLOADER)), yes)
        OPT_DEFS += -DMAKE_BOOTLOADER
    endif

    # At least until build.mk or the like drops, this is here to prevent
    # VUSB boards from enabling NKRO, as they do not support it. Ideally
    # this should be handled per keyboard, but until that happens ...
    ifeq ($(strip $(PROTOCOL)), VUSB)
        NKRO_ENABLE       = no
    endif

    ifeq ($(strip $(OLED_DRIVER_ENABLE)), yes)
        SRC += oled_stuff.c
    endif
endif