$1 argument to scripts that have it should be dev or dongle, see autobuild
for examples.

autobuild   - does full clean then full build
prepare $1  - unpacks busybox tree into $1 dir
              only to be used after fullclean (or just un-tarred package)
build $1 $2 - work with busybox under $1 dir. copy config file $2 to busybox
              and compile it
              only to be used on a cleaned busybox tree
clean $1    - runs make distclean on busybox tree in dir $1
              makes it ready for build
fullclean   - removes busybox trees in order to start from scratch