on bare repositories.
This only makes sense when `RUN_SETUP` is also set.
-. Add `builtin-foo.o` to `BUILTIN_OBJS` in `Makefile`.
+. Add `builtin/foo.o` to `BUILTIN_OBJS` in `Makefile`.
Additionally, if `foo` is a new command, there are 3 more things to do: