hidden and ignore files in an archetype?

Hi all -

I don't seem to be able to include .gitignore in my archetype.

For testing, I created a FOO file right next to the .gitignore and in
the unfiltered fileset, I configured it to pick up both ".gitignore"
and "FOO" and only FOO shows up in the project generated from the
archetype.

Is there something really magical I need to include this "hidden" file?