Hitting brick wall trying to organize my Guix configuration files -> error: (gnu): unknown keyword or bad argument

I’m trying to follow the guide, but for whatever reason, I’m getting this error:

$ guix system -L ~/dotfiles reconfigure ~/dotfiles/config/systems/gemini.scm
config/systems/gemini.scm:2:16: error: (gnu): unknown keyword or bad argument

change “#:use-modules” to “#:use-module