sudo apt-cache policy nvidia-driver
nvidia-driver:
  Installed: 340.65-2
  Candidate: 340.65-2
  Version table:
     352.63-1 0
          1 http://ftp.debian.org/debian/ experimental/non-free amd64 Packages
 *** 340.65-2 0
        500 http://ftp.tw.debian.org/debian/ jessie/non-free amd64 Packages
        100 /var/lib/dpkg/status