it work now

flake.nix

@@ -1,31 +1,40 @@
-{ inputs = {
+{
+  inputs = {
     flake-utils.url = "github:numtide/flake-utils/v1.0.0";
 
     nixpkgs.url = "github:NixOS/nixpkgs/25.11";
   };
 
-  outputs = { flake-utils, nixpkgs, ... }:
-    flake-utils.lib.eachDefaultSystem (system:
+  outputs =
+    { flake-utils, nixpkgs, ... }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
       let
         pkgs = nixpkgs.legacyPackages."${system}";
+        modulesPath = "${pkgs.path}/nixos/modules";
 
-        base = { lib, modulesPath, ... }: {
-          imports = [ "${modulesPath}/virtualisation/qemu-vm.nix" ];
+        base =
+          { lib, modulesPath, ... }:
+          {
+            imports = [ "${modulesPath}/virtualisation/qemu-vm.nix" ];
 
-          # https://github.com/utmapp/UTM/issues/2353
-          networking.nameservers = lib.mkIf pkgs.stdenv.isDarwin [ "8.8.8.8" ];
+            # https://github.com/utmapp/UTM/issues/2353
+            networking.nameservers = lib.mkIf pkgs.stdenv.isDarwin [ "8.8.8.8" ];
 
-          virtualisation = {
-            graphics = false;
+            virtualisation = {
+              graphics = false;
 
-            host = { inherit pkgs; };
+              host = { inherit pkgs; };
+            };
           };
-        };
 
         machine = nixpkgs.lib.nixosSystem {
           system = builtins.replaceStrings [ "darwin" ] [ "linux" ] system;
 
-          modules = [ base ./module.nix ];
+          modules = [
+            base
+            ./module.nix
+          ];
         };
 
         program = pkgs.writeShellScript "run-vm.sh" ''
@@ -37,13 +46,16 @@
         '';
 
       in
-        { packages = { inherit machine; };
+      {
+        packages = { inherit (machine.config.system.build) vm; };
 
-          apps.default = {
-            type = "app";
+        defaultPackage = machine.config.system.build.vm;
 
-            program = "${program}";
-          };
-        }
+        apps.default = {
+          type = "app";
+
+          program = "${program}";
+        };
+      }
     );
 }