Cuda Toolkit with Legacy Driver (390.xx) on Debian 11

Hey! I’m trying to setup the Cuda Toolkit on my Debian 11 system with 390.xx driver installed but I’m having some trouble. I can’t install directly from the Debian repository (nvidia-cuda-dev) since it asks me to install the ‘nvidia-driver’ package and others packages that refer to more recent nvidia driver versions. I also tried to install Cuda 8 with the deb file provided on the Cuda toolkit download page, but the package have a lot of dependencies that are not available on Debian 11. What should I do? (My GPU: Geforce GTX 560)