how to identify reverse dependencies?

[Miles Fidelman <mfidelman@meetinghouse.net>]

Apropos all the discussion on systemd, I'm curious about how to 
determine all the packages that depend on it.

All my systems are running squeeze (call me very conservative when it 
comes to upgrades - actually, I have one, very stable virtual machine 
that still runs lenny)), and apt-rdepends seems to only run on wheezy 
and above.

Are there any tools for checking reverse dependencies - particularly 
against the jessie repo?  In particular a tool that does not have to be 
running on jessie, to check dependencies as regards jessie.

Thanks,

Miles Fidelman


--
In theory, there is no difference between theory and practice.
In practice, there is.   .... Yogi Berra