POSTIN

/bin/sh

for app in grmic grmiregistry; do
  # Remove binaries if not alternativeszificated yet
  [ ! -L /usr/bin/$app ] && /bin/rm -f /usr/bin/$app
  # Build slaves list
  slaves="$slaves --slave /usr/bin/$app $app /usr/bin/$app-4.2.3"
done
/usr/sbin/update-alternatives --install /usr/bin/gij gij /usr/bin/gij-4.2.3 20 $slaves

POSTUN

/bin/sh

if [ ! -f "/usr/bin/gij-4.2.3" ]; then
  /usr/sbin/update-alternatives --remove gij /usr/bin/gij-4.2.3
fi