bad dependencies in postgresql (potato)?

[albbregu@ns.ulatina.ac.cr (Alberto Brealey G.)]

i'm trying to install postgresql in a potato box, however, the configuration
script bombs out with a message concerning the non-existence of the file
'/etc/timezone'. is that a missing package? or is it something that got
replaced somewhere in the way to the current version? how can i set it up so
i can install postgresql?

TIA

Alberto