Connecting to a hidden network on Arch Linux

If you're using netctl to manage your network connections on Arch and need to connect to a hidden wireless network, make sure that you have Hidden=yes in your config file e.g.

ini
Description=Your Description
Interface=wlp6s0
Connection=wireless
IP=dhcp
Priority=10
Security=wpa
ESSID="<SSID Name>"
Key="<PASSPHRASE>"
Hidden=yes

netctl will refuse to connect without Hidden=yes, even if all of the other options are correct.