-#BOOTMAGIC_ENABLE = yes # Virtual DIP switch configuration(+1000)
-MOUSEKEY_ENABLE = yes # Mouse keys(+4700)
-EXTRAKEY_ENABLE = yes # Audio control and System control(+450)
-CONSOLE_ENABLE = yes # Console for debug(+400)
-COMMAND_ENABLE = yes # Commands for debug and configuration
-#NKRO_ENABLE = yes # USB Nkey Rollover - not yet supported in LUFA
+BOOTMAGIC_ENABLE ?= no # Virtual DIP switch configuration(+1000)
+MOUSEKEY_ENABLE ?= yes # Mouse keys(+4700)
+EXTRAKEY_ENABLE ?= yes # Audio control and System control(+450)
+CONSOLE_ENABLE ?= yes # Console for debug(+400)
+COMMAND_ENABLE ?= yes # Commands for debug and configuration
+NKRO_ENABLE ?= no # USB Nkey Rollover