qmk_firmware/users/ninjonas/rules.mk

BOOTMAGIC_ENABLE = no       # Enable Bootmagic Lite
MOUSEKEY_ENABLE = yes       # Mouse keys(+4700)
EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
TAP_DANCE_ENABLE = yes      # Enable Tap Dance.
COMBO_ENABLE = yes          # Enable Combos

SRC += ninjonas.c \
       process_records.c \
       tap_dances.c \
       oled.c \
       encoder.c \
       combos.c

ifneq ("$(wildcard $(USER_PATH)/secrets.c)","")
    SRC += secrets.c
endif