PREUN

/bin/sh

if [ "$1" = "0" -a -x /usr/bin/gconftool-2 ]; then
   /usr/bin/gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --unset /desktop/gnome/thumbnailers/application@x-blender/enable
   /usr/bin/gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --unset /desktop/gnome/thumbnailers/application@x-blender/command
fi

POSTIN

/bin/sh

if [ -x /usr/bin/gconftool-2 ]; then
   /usr/bin/gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --type boolean --set /desktop/gnome/thumbnailers/application@x-blender/enable true
   /usr/bin/gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --type string --set /desktop/gnome/thumbnailers/application@x-blender/command "blender2.8-thumbnailer.py %u %o"
fi