{ self, inputs, ... }: {

    flake.nixosModules.pi4-core = { config, pkgs, ... }: {

        imports = with self.nixosModules; [

            inputs.home-manager.nixosModules.default

            self.nixosModules.default
            user-nathan
            avahi
            openssh
        ];

        config = {

            boot = {
                loader = {
                    grub.enable = false;
                    generic-extlinux-compatible.enable = true;
                };
                kernelParams = [ "snd_bcm2835.enable_hdmi=1" "snd_bcm2835.enable_headphones=1" ];
            };

            networking = {
                hostName = "pi4";
                nameservers = [ "1.1.1.1" "1.0.0.1" ];
                networkmanager.enable = true;
            };

            hardware = {
                bluetooth.enable = true;

            };

            programs.zsh.enable = true;

            environment.shells = with pkgs; [ zsh ];

            environment.systemPackages = with pkgs; [
                libraspberrypi
                raspberrypi-eeprom
            ];

            users = { 
                groups.gpio = {};
            };

            services = {
                udev.extraRules = ''
                    SUBSYSTEM=="bcm2835-gpiomem", KERNEL=="gpiomem", GROUP="gpio",MODE="0660"
                    SUBSYSTEM=="gpio", KERNEL=="gpiochip*", ACTION=="add", RUN+="${pkgs.bash}/bin/bash -c 'chown root:gpio /sys/class/gpio/export /sys/class/gpio/unexport ; chmod 220 /sys/class/gpio/export /sys/class/gpio/unexport'"
                    SUBSYSTEM=="gpio", KERNEL=="gpio*", ACTION=="add",RUN+="${pkgs.bash}/bin/bash -c 'chown root:gpio /sys%p/active_low /sys%p/direction /sys%p/edge /sys%p/value ; chmod 660 /sys%p/active_low /sys%p/direction /sys%p/edge /sys%p/value'"
                '';

                pulseaudio = {
                    enable = true;
                    extraConfig = ''
                        load-module module-native-protocol-tcp auth-ip-acl=127.0.0.1
                    '';
                };

            };

            fonts.packages = with pkgs; [ nerd-fonts.fira-code ];

            security.rtkit.enable = true;

            system.stateVersion = "25.11";
        };
    };
}