How to Handle Dependencies Correctly

[Jeff Rush]

I'm enabling new packages for an image but have a bit of a puzzle.  I add a
new package to build/conf/local.conf:

  DISTRO_EXTRA_RDEPENDS += "python-pybluez"

and when I do a:

   make rebuild-package-task-base
   make openmoko-devel-image

it fails with a note about not being able to satisfy the dependency on
"python-pybluez".  However, if I then do:

   make build-package-python-pybluez
   make openmoko-devel-image

it builds fine.  How do I make OE satisfy this dependency itself?

-Jeff