Start cage with WLR_LIBINPUT_NO_DEVICES=1 set (no keyboard mouse connected on pi4b)

Help
1

Hi, im using cage lately on my raspberrypi4b and it works like a charm, starts automatically after booting and displays firefox with the url set, until i realised without a connected keyboard or mouse it results in a black screen as described in

…im having difficulties integrating WLR_LIBINPUT_NO_DEVICES=1 to my setup, would anyone be so kind and help me out on how to do this?
my current configuration looks like this;
…
environment.systemPackages = with pkgs; [ cage (…) firefox ];
services.cage = {
enable = true;
user = “user1”;
program = “${pkgs.firefox}/bin/firefox -kiosk -private-window https://github.com”;
};
thanks in advance for your help!

2

after some classic trial and error sessions i solved it;
inside the config;
…
let
wlrLibinputNoDevices = “1”;
…
{
…
services.cage = {
…
environment = {
WLR_LIBINPUT_NO_DEVICES = wlrLibinputNoDevices;
};
};
…
}