If only BB_DPKG was enabled in Config.h, busybox would not build; it'd say:
[oweals/busybox.git] / init /
drwxr-xr-x   ..
-rw-r--r-- 1103 halt.c
-rw-r--r-- 26284 init.c
-rw-r--r-- 1111 poweroff.c
-rw-r--r-- 1187 reboot.c