post_install() {
  echo "HEVEA is fully functional when other software are installed:"
  echo "* A modern LaTeX installation including dvips."
  echo "* The ghostscript PostScript interpreter."
  echo "* The netpbm image processing package."
  echo "However, these are optional and hevea runs without them."
  texhash
}

post_upgrade() {
  post_install $1
}