diff --git a/flake.nix b/flake.nix
index b06909f..a34ea46 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,8 +20,6 @@
             };
             inherit (inputs.nixpkgs) lib;
             commonModules = [
-              ./modules/boot.nix
-              ./modules/networking.nix
               ./modules/nix-config.nix
               ./modules/security.nix
               ./modules/users.nix
@@ -38,15 +36,67 @@
               ++ lib.optionals (type == "desktop") desktopModules
               # Options for specific hostnames.
               ++ (lib.optionals (hostname == "nemesis") [
+                ./modules/boot.nix
                 ./modules/bootloaders/systemd-boot.nix
                 ./modules/filesystems/hw-nemesis.nix
                 ./modules/hardware/cpu_amd.nix
                 ./modules/hardware/nvidia.nix
+                ./modules/networking.nix
+                inputs.nixos-hardware.nixosModules.gigabyte-b650
+                {
+                  boot.binfmt.emulatedSystems = [ "aarch64-linux" ];
+                }
               ])
               ++ (lib.optionals (hostname == "mellinoe" || hostname == "apollo") [
+                ./modules/boot.nix
                 ./modules/bootloaders/systemd-boot.nix
                 ./modules/filesystems/impermanence.nix
                 ./modules/hardware/cpu_intel.nix
+                ./modules/networking.nix
+              ])
+              ++ (lib.optionals (hostname == "orpheus") [
+                # inputs.nixos-hardware.nixosModules.raspberry-pi-4
+                # Base SD image module for the target architecture
+                "${inputs.nixpkgs}/nixos/modules/installer/sd-card/sd-image-aarch64.nix"
+                (
+                  {
+                    pkgs,
+                    config,
+                    lib,
+                    ...
+                  }:
+                  {
+                    nixpkgs.hostPlatform = lib.mkDefault "aarch64-linux";
+                    # fileSystems."/" = {
+                    #   device = bootDisk;
+                    #   fsType = "ext4";
+                    # };
+                    services.cage = {
+                      enable = true;
+                      user = "rafiq";
+                      program = "${pkgs.firefox}/bin/firefox -kiosk -private-window https://youtube.com/tv";
+                    };
+                    networking = {
+                      hostName = hostname;
+                      useDHCP = lib.mkDefault true;
+
+                      # Configures a simple stateful firewall.
+                      # By default, it doesn't allow any incoming connections.
+                      firewall = {
+                        enable = true;
+                        allowedTCPPorts = [
+                          22 # SSH
+                        ];
+                      };
+                    };
+                    services.openssh.enable = true;
+                    services.openssh.settings.PrintMotd = true;
+                    services.tailscale = {
+                      enable = true;
+                      authKeyFile = config.sops.secrets.ts_auth_key.path;
+                    };
+                  }
+                )
               ]);
           };
       };
@@ -58,7 +108,11 @@
         )
         (mkSystem "desktop" "mellinoe" "/dev/disk/by-id/nvme-eui.01000000000000008ce38e04019a68ab")
         (mkSystem "headless" "apollo" "/dev/disk/by-id/nvme-eui.002538d221b47b01")
+        (mkSystem "headless" "orpheus" "/dev/disk/by-uuid/44444444-4444-4444-8888-888888888888")
       ];
+
+      # Make the SD image the default build output for `nix build`
+      packages.aarch64-linux.default = self.nixosConfigurations.orpheus.config.system.build.sdImage;
     };
   inputs = {
     impermanence.url = "github:nix-community/impermanence";
diff --git a/modules/nix-config.nix b/modules/nix-config.nix
index dd05bb8..22e8fc4 100644
--- a/modules/nix-config.nix
+++ b/modules/nix-config.nix
@@ -13,7 +13,13 @@
     trusted-users = [ "@wheel" ];
 
     # Add binary caches to avoid having to compile them
-    substituters = [ "https://nix-community.cachix.org" ];
-    trusted-public-keys = [ "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs=" ];
+    substituters = [
+      "https://cache.nixos.org"
+      "https://nix-community.cachix.org"
+    ];
+    trusted-public-keys = [
+      "cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY="
+      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
+    ];
   };
 }