Added pi4 configuration

systems/aarch64-linux/pi4/default.nix

@@ -0,0 +1,85 @@
+{
+  config,
+  pkgs,
+  lib,
+  inputs,
+  nixpkgs,
+  modulesPath,
+  ...
+}: {
+  imports = with inputs; [
+    (modulesPath + "/installer/scan/not-detected.nix")
+    (modulesPath + "/installer/sd-card/sd-image-aarch64.nix")
+    nixos-hardware.nixosModules.raspberry-pi-4
+  ];
+
+  # Workaround for issue 109280
+  # See here: https://github.com/NixOS/nixpkgs/issues/109280#issuecomment-973636212
+  nixpkgs.overlays = [
+    (final: super: {
+      makeModulesClosure = x:
+        super.makeModulesClosure (x // {allowMissing = true;});
+    })
+  ];
+
+  age.secrets.cf_dns_kilonull.file = ../../../secrets/cf_dns_kilonull.age;
+
+  aa = {
+    nix.enable = true;
+    nix.useSelfhostedCache = true;
+
+    apps.btop.enable = true;
+    apps.tmux.enable = true;
+
+    services.tailscale = {
+      enable = true;
+      configureClientRouting = true;
+      configureServerRouting = true;
+    };
+    services.openssh.enable = true;
+    services.octoprint = {
+      enable = true;
+      acmeCertName = "kilonull.com";
+    };
+
+    security.acme = {
+      enable = true;
+      domainName = "kilonull.com";
+      dnsCredentialsFile = config.age.secrets.cf_dns_kilonull.path;
+    };
+
+    suites.utils.enable = true;
+    tools.zsh.enable = true;
+  };
+
+  environment.systemPackages = with pkgs; [
+    libraspberrypi
+    raspberrypi-eeprom
+  ];
+
+  networking = {
+    hostName = "pi4";
+    useDHCP = false;
+    defaultGateway = "192.168.113.1";
+    nameservers = ["192.168.113.13" "1.1.1.1"];
+    interfaces.end0.ipv4.addresses = [
+      {
+        address = "192.168.113.42";
+        prefixLength = 24;
+      }
+    ];
+  };
+
+  security.sudo = {
+    wheelNeedsPassword = false;
+    execWheelOnly = true;
+  };
+
+  # This value determines the NixOS release from which the default
+  # settings for stateful data, like file locations and database versions
+  # on your system were taken. It‘s perfectly fine and recommended to leave
+  # this value at the release version of the first install of this system.
+  # Before changing this value read the documentation for this option
+  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
+  system.stateVersion = "23.05"; # Did you read the comment?
+}

systems/x86_64-linux/gospel/default.nix

@@ -73,7 +73,7 @@
     };
   };
 
-  boot.binfmt.emulatedSystems = ["aarch64-linux" "armv6l-linux"];
+  # boot.binfmt.emulatedSystems = ["aarch64-linux" "armv6l-linux"];
   networking = {
     hostName = "gospel";
     useDHCP = false;