# https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=770938
  DPkg::Pre-Invoke       { "if [ -x /usr/bin/snapper ]; then snapper create -d apt -t pre -p > /var/tmp/snapper-apt || true ; fi"; };
  DPkg::Post-Invoke      { "if [ -x /usr/bin/snapper ]; then snapper create -d apt -t post --pre-number=`cat /var/tmp/snapper-apt` || true ; fi"; };
