GDBM Ruby bindings on OSX

Howdy folks,

Is there anyone out there with the Ruby bindings for GDBM working on
their Mac? Here's some details:

$ ruby -v
ruby 1.8.4 (2005-12-24) [i686-darwin8.7.1]

$ port installed gdbm
The following ports are currently installed:
  gdbm @1.8.3_1 (active)

$ locate ruby | grep bundle | grep dbm
/opt/local/lib/ruby/1.8/i686-darwin8.7.1/dbm.bundle
/opt/local/lib/ruby/1.8/i686-darwin8.7.1/sdbm.bundle
/usr/lib/ruby/1.8/universal-darwin8.0/dbm.bundle
/usr/lib/ruby/1.8/universal-darwin8.0/sdbm.bundle

Any ideas? I seem to remember Dave Thomas from pragprog asking about
something similar.

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Nathan de Vries