post_install() {
  echo "Maybe you have to restart CUPS to use the added driver"
}

post_upgrade() {
  echo "Maybe you have to restart CUPS to use the changed driver"
  echo ""
  echo "When upgrading from 2.0.4 to 3.1.0 the driver name changes from"
  echo "'Brother DCP7065DN for CUPS' to 'Brother BrGenML1 for CUPS'"
  echo ""
  echo "To make use of the updated driver, edit your printer in the CUPS"
  echo "webinterface and select the new driver"
}