pkg=odepkg

post_install() {
  echo "pkg prefix /usr/share/octave/packages /usr/lib   /octave/packages; pkg install -global /usr/share/octave/$pkg.tar.gz"   | octave --silent
}

post_upgrade() {
  post_remove
  post_install
}

post_remove() {
  echo "pkg prefix /usr/share/octave/packages /usr   /lib/octave/packages; pkg uninstall $pkg" | octave --silent
}