I'm not sure whether this is the right place to put this but I thought it might help as I've just had to follow these steps myself.
On this ATI driver installation guide, there are some additional packages that need to be installed otherwise there are errors when creating the deb files that do not make it obvious that packages are missing. These are:
I thought maybe someone might like to add this information to the page, as additional packages to:Code:dpkg-dev dh-make
Code:sudo apt-get install dkms