Arch Linux

Description:

The post-install message:
cat <<EOF
==> The following daemons may be added to DAEMONS in /etc/rc.conf:
==> avahi-daemon: the mdns responder, you probably want this.
==> dbus needs to be running when you start it.
==> avahi-dnsconfd: daemon used for peer-to-peer automatic dns
==> configuration on dhcp-less networks.

==> To use some of the client applications you will have to install python.
==> In addition, pygtk is required for the graphical ones and
==> twisted for avahi-bookmarks.
EOF

should be removed or at least updated. The /etc/rc.conf doesn't exist anymore so it should be adapted to systemd or, IMHO, completely removed.

The second paragraph should be removed as optdepends should be used instead.