POSTIN

/bin/sh

/usr/sbin/update-alternatives \
  --install /etc/sound/profiles/current soundprofile /etc/sound/profiles/alsa 10

POSTUN

/bin/sh

if [ ! -f /etc/sound/profiles/alsa/profile.conf ]; then
  /usr/sbin/update-alternatives --remove soundprofile /etc/sound/profiles/alsa
fi