add iso

flake.nix

@@ -22,7 +22,8 @@
 
       flake.nixosModules.default = import ./module.nix;
 
-      flake.nixosConfigurations.example = inputs.nixpkgs.lib.nixosSystem {
+      flake.nixosConfigurations = {
+        example = inputs.nixpkgs.lib.nixosSystem {
           system = "aarch64-linux";
           modules = [
             self.nixosModules.default
@@ -43,5 +44,18 @@
             }
           ];
         };
+
+        iso = inputs.nixpkgs.lib.nixosSystem {
+          system = "aarch64-linux";
+          modules = [
+            self.nixosModules.default
+            "${inputs.nixpkgs}/nixos/modules/installer/cd-dvd/installation-cd-minimal.nix"
+            {
+              nixos-x13s.enable = true;
+              nixpkgs.config.allowUnfree = true;
+            }
+          ];
+        };
+      };
     };
 }

module.nix

@@ -15,10 +15,7 @@ let
       pkgs.linuxPackages_latest
     else
       pkgs.linuxPackagesFor (
-        if cfg.kernel == "jhovold" then
-          x13sPackages.linux_jhovold
-        else
-          throw "Unsupported kernel"
+        if cfg.kernel == "jhovold" then x13sPackages.linux_jhovold else throw "Unsupported kernel"
       );
   dtb = "${linuxPackages_x13s.kernel}/dtbs/qcom/${dtbName}";
   dtbEfiPath = "dtbs/${cfg.kernel}/${config.boot.kernelPackages.kernel.version}/${dtbName}";
@@ -107,6 +104,17 @@ in
       };
     };
 
+    isoImage = {
+      makeUsbBootable = lib.mkForce false;
+      squashfsCompression = "zstd -Xcompression-level 6";
+      contents = [
+        {
+          source = dtb;
+          target = "/" + dtbName;
+        }
+      ];
+    };
+
     nixpkgs.overlays = [
       (_: super: {
         # don't try and use zfs