Hi every one I have build my own image of nixos and flash it on SD card following this repo https://github.com/Robertof/nixos-docker-sd-image-builder#raspberry-pi-3-and-4 then I ssh in to my r pi 3 and it's working then after I created my /etc/nixos/configuration.nix nixos-rebuild switch and reboot then R pi is not responding no flashing green light can anyone share their working r pi 3 config with me Thanks https://github.com/Robertof/nixos-docker-sd-image-builder/issues/15