"That would mean that you wouldn't have a chance, ever, to try the
upstream installer."
There is a command-line option that can be used to override the script and proceed with the nvidia-installer. But as Alberto says above, if someone has gotten to that point, they obviously know exactly what they are doing.
The only other option I can think of is to tie nvidia-common harder to the system using a Depends on the big metapackages (ubuntu-desktop et al.)
"That would mean that you wouldn't have a chance, ever, to try the
upstream installer."
There is a command-line option that can be used to override the script and proceed with the nvidia-installer. But as Alberto says above, if someone has gotten to that point, they obviously know exactly what they are doing.
The only other option I can think of is to tie nvidia-common harder to the system using a Depends on the big metapackages (ubuntu-desktop et al.)