Cannot connect to wifi with wpa_supplicant

I just installed Arch Linux on my laptop. So far I have only been able to connect to wired networks. When I try to connect to my wifi network with `wpa_supplicant -D nl80211,wext -i wlp3s0 -C Note: Because of the process substitution, you cannot run this command with sudo - you will need a root shell. Just pre-pending sudo will lead to the following error: Successfully initialized wpa_supplicant Failed to open config file '/dev/fd/63', error: No such file or directory Failed to read or parse configuration '/dev/fd/63' WPA supplicant - Connecting with wpa_passphrase | wiki.archlinux.org That says I need to be in a root shell rather than running with the sudo prefix. The thing is, that's what I have been doing. I have tried this by logging into my computer as root and as logging in with my user and switching to root with su - root, but I always get this error.