I created my own internal repository following the instructions here: How to create a local APT repository?
I added the line deb file:/usr/local/mydebs/ ./ to my /etc/apt/sources.list
How do I specify the --target-release if my target release is just ./?
For example if I added the line
deb http://mozilla.debian.net/ squeeze-backports iceweasel-release
to my /etc/apt/sources.list I would specify it like this
apt-get install -t squeeze-backports iceweasel