how to update a pkg marked not for deletion?

["Mark E. Perkins" <perkinsm%bway.net@localhost>]

Having updated pkg_install, I thought I might as well update the other
pkgtools that changed recently (pax, tnftp).  But they're marked as not for
deletion, so they cannot be deleted. :-)  None of the suggestions in the error
messages (pkg_delete, make {update,replace}) works.  So how *does* one go
about updating them?

Thanks,
Mark