Help getting gnomeExtensions appindicator working

Help
1

I am just starting with NixOS. I have installed 25.05 with GNOME.

I would like to use the GNOME appindicator extension and have followed the instructions in the GNOME - NixOS Wiki, adding the definitions below in the relevant places in /etc/nixos/configuration.nix.

{
  environment.systemPackages = [ pkgs.gnomeExtensions.appindicator  ];
  services.udev.packages = [ pkgs.gnome-settings-daemon ];
}

After I sudo nixos-rebuild boot (this succeeds) and reboot, the systray is not present, and the gnome settings daemon is not running (journalctl -u gnome-settings-daemon prints “No entries”).

I’m not sure where to start here, and I’m sure I’ve missed information that would helpful. What should I do to understand what is not working and what have I missed?

2

I ran into this same issue having glossed over the final step on the wiki:

Finally enable Appindicator using the Gnome Extensions app.