The bumblebee-nvidia package depends on the nvidia-packages.
sudo apt-get --purge remove bumblebee*
sudo apt-get install nvidia-331 nvidia-prime
sudo prime-select nvidia
The nvidia-prime package enables Optimus. There's no need to use bumblebee, unless you prefer to use it (in which case you should remove nvidia-prime)
The bumblebee-nvidia package depends on the nvidia-packages.
sudo apt-get --purge remove bumblebee*
sudo apt-get install nvidia-331 nvidia-prime
sudo prime-select nvidia
The nvidia-prime package enables Optimus. There's no need to use bumblebee, unless you prefer to use it (in which case you should remove nvidia-prime)