POSTIN

/bin/sh

update-alternatives --install /etc/dynamic/launchers/scanner/kde.desktop scanner.kde.dynamic /etc/dynamic/launchers/scanner/kdegraphics4.desktop 31
update-alternatives --install /etc/dynamic/launchers/scanner/gnome.desktop scanner.gnome.dynamic /etc/dynamic/launchers/scanner/kdegraphics4.desktop 29

POSTUN

/bin/sh

if [ $1 = 0 ]; then
  update-alternatives --remove scanner.kde.dynamic /etc/dynamic/launchers/scanner/kdegraphics4.desktop
  update-alternatives --remove scanner.gnome.dynamic /etc/dynamic/launchers/scanner/kdegraphics4.desktop
fi