add checks output

checks/default.nix

@@ -0,0 +1,21 @@
+inputs@{ self, nixpkgs, ... }:
+final: prev:
+
+	let
+	kvm_guest = nixpkgs.lib.nixosSystem {
+	inherit (final) system;
+		modules = [
+		self.nixosModules.miniguest
+		{
+		boot.miniguest.enable = true;
+		boot.loader.grub.enable = false;
+		fileSystems."/" = {
+		    device = "none";
+    fsType = "tmpfs";
+    options = [ "defaults" "mode=755" ];
+};
+		} ];
+	};
+	in final.lib.optionalAttrs final.stdenv.isLinux {
+	build_kvm_guest = kvm_guest.config.system.build.miniguest;
+}

flake.nix

@@ -24,6 +24,7 @@
           devShell = final.devshell.mkShell {
             imports = [ (final.devshell.importTOML ./devshell.toml) ];
           };
+          checks = import ./checks inputs final prev;
         };
       };
     };