Hi GNUser
... 1. It needs a .dep file that lists libconfuse.tcz as a dependency ...
I'm afraid my feeble brain can not figure this out with the supplied information.
i3status.tcz.dep and tilda.tcz.dep depend on libconfuse.tcz.
Nothing depends on libconfuse-dev.tcz.
libconfuse.tcz and libconfuse-dev.tcz list no dependencies.
By the way, if A depends on C, and B depends on C, A can still include B as a dependency.