create sd image for pi 4

flake.nix

@@ -110,6 +110,27 @@
               ./hosts/rico1
             ];
           };
+        PiInstaller =
+          let
+            hostname = "PiInstaller";
+            system = "aarch64-linux";
+            username = "adtya";
+          in
+          lib.nixosSystem {
+            inherit system;
+            pkgs = packages system;
+            specialArgs = { inherit inputs username; };
+            modules = [
+              {
+                system.configurationRevision = lib.mkIf (self ? rev) self.rev;
+                networking.hostName = lib.mkDefault hostname;
+                nixpkgs.hostPlatform = lib.mkDefault system;
+              }
+              nixos-hardware.nixosModules.raspberry-pi-4
+              ./common/nix.nix
+              ./sdimage/piinstaller
+            ];
+          };
       };
     }
     // flake-utils.lib.eachDefaultSystem (system:

sdimage/piinstaller/default.nix

@@ -0,0 +1,124 @@
+{ lib, pkgs, modulesPath, username, ... }:
+
+{
+  imports = [
+    (modulesPath + "/installer/sd-card/sd-image-aarch64.nix")
+  ];
+
+  nixpkgs.overlays = [
+    (final: super: {
+      makeModulesClosure = x:
+        super.makeModulesClosure (x // { allowMissing = true; });
+    })
+  ];
+
+  boot.kernelPackages = lib.mkForce pkgs.linuxKernel.packages.linux_rpi4;
+  boot.supportedFilesystems = lib.mkForce [ "vfat" "ext4" "btrfs" ];
+  hardware = {
+    deviceTree = {
+      enable = true;
+    };
+    raspberry-pi."4" = {
+      apply-overlays-dtmerge.enable = true;
+      poe-plus-hat.enable = true;
+      xhci.enable = true;
+    };
+  };
+
+  programs = {
+    git.enable = true;
+    zsh = {
+      enable = true;
+      autosuggestions.enable = true;
+      syntaxHighlighting.enable = true;
+    };
+  };
+
+  environment.pathsToLink = [ "/share/zsh" ];
+  environment.systemPackages = with pkgs; [
+    sops
+    age
+    libraspberrypi
+    raspberrypi-eeprom
+  ];
+  sdImage.compressImage = false;
+
+  networking = {
+    nameservers = [
+      "2620:fe::fe#dns.quad9.net"
+      "9.9.9.9#dns.quad9.net"
+      "2620:fe::9#dns.quad9.net"
+      "149.112.112.112#dns.quad9.net"
+    ];
+
+    networkmanager = {
+      enable = true;
+      dhcp = "dhcpcd";
+      dns = "systemd-resolved";
+      wifi = {
+        backend = "iwd";
+        powersave = false;
+      };
+    };
+
+    useDHCP = lib.mkDefault false;
+
+    wireless.iwd = {
+      enable = true;
+      settings = {
+        General = {
+          AddressRandomization = "network";
+          EnableNetworkConfiguration = false;
+        };
+        Settings = {
+          AutoConnect = "yes";
+        };
+      };
+    };
+  };
+
+  services.resolved = {
+    enable = true;
+    dnssec = "true";
+    dnsovertls = "true";
+    domains = [ "~." ];
+    fallbackDns = [ ];
+  };
+
+  services.openssh.enable = true;
+  security.sudo.wheelNeedsPassword = false;
+  users.users.${username} = {
+    isNormalUser = true;
+    extraGroups = [ "wheel" ];
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPxDgoV9yf+yPnp4pt5EWgo7uC25W66ehoL/rlshVW+8 Skipper"
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIPodFFNUK16y9bjHVMhr+Ykro3v1FVLbmqKg7mjMv3Wz Kowalski"
+    ];
+  };
+
+  i18n = {
+    defaultLocale = "en_US.UTF-8";
+    extraLocaleSettings = {
+      LC_ADDRESS = "en_US.UTF-8";
+      LC_IDENTIFICATION = "en_US.UTF-8";
+      LC_MEASUREMENT = "en_US.UTF-8";
+      LC_MONETARY = "en_US.UTF-8";
+      LC_NAME = "en_US.UTF-8";
+      LC_NUMERIC = "en_US.UTF-8";
+      LC_PAPER = "en_US.UTF-8";
+      LC_TELEPHONE = "en_US.UTF-8";
+      LC_TIME = "en_US.UTF-8";
+      LC_ALL = "en_US.UTF-8";
+    };
+    supportedLocales = [ "en_US.UTF-8/UTF-8" ];
+  };
+
+  time.timeZone = "Asia/Kolkata";
+  system = {
+    switch = {
+      enable = false;
+      enableNg = true;
+    };
+    stateVersion = "24.11";
+  };
+}