I had a similar problem with my bulk build area in that I only wanted
to compile packages which I explicitly listed, but didn't want to 
recompile them all if I added to it.  I was told to use

  DEPENDS_TARGET=bin-install
  USE_BULK_TIMESTAMPS=no

which allowed a graceful restart, but has the drawback that if you 
update your CVS, you may find things not recompiling when they should.

I intend to remove these two lines when I update my pkgsrc tree.

-- 
Malcolm Herbert                                This brain intentionally
mjch@mjch.net                                                left blank