Visual display of package dependency graph?

[Paul Goyette <paul%whooppee.com@localhost>]

A long time ago (and in a universe far far away) I seem to remember 
there was a package utility that would visually display all of the 
installed packages and their interdependencies.  But I can't remember 
what it was called, and none of the packages in pkgsrc/pkgtools seems 
quite right.

Any hints?

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