Path/filename info not set for CCK and similar projects

$project['filename'] is empty AFAICT for CCK. I *think* this is happenning because it doesn't contain a module called cck. Or it could be happenning because I am using cvs_deploy which implements the alter hook. Anyway, this is causing a problem for drush_pm.module which doesn't know what project directory to backup before updating.

i tried to dive in but got a bit tangled. it seems that filename is supposed to be set in update_status_get_projects() but isn't. the intentions there are not totally clear.