case $THIS_SUB_DEPENDS in
    SSL) message "wget with SSL backend is requested, forcing it" &&
         case $WGET_SSL in
           gnutls)  depends gnutls "--with-ssl=gnutls"
           ;;
           SSL) depends SSL "--with-ssl=openssl"
           ;;
         esac
         ;;
      *) echo "unknown sub_depends $THIS_SUB_DEPENDS"; false ;;
esac