Make sure you have sources for kernel you are running.

Go to /usr/src and unpack the driver source archive:

$ cd /usr/src
$ tar xzvf affix.tar.gz

Now affix source is in /usr/src/modules/affix.

Go to your kernel source (i.e. /usr/src/linux) directory and run make-kpkg:

$ cd /usr/src/kernel-source-<version>
$ make-kpkg --added-modules affix modules_image --rootcmd fakeroot

Then you get package affix-modules-<version>.deb. Install it with:

# dpkg -i affix-modules-<version>.deb