I'm trying to use UUID's in PostgreSQL and I have to import the package according to the postgres 8.4 doc.

I got the necessary package installed in order to run pg_config --sharedir but now when I try to execute:
psql -d dbname -f SHAREDIR/contrib/module.sql

my SHAREDIR folder is apparently:
/usr/share/postgresql/8.4

and there's no contrib folder in it. any ideas?