create dev shell with nixos rebuild

flake.nix

@@ -10,7 +10,10 @@
     };
   };
 
-  outputs = { self, nixpkgs, home-manager, ... }@inputs: {
+  outputs = { self, nixpkgs, home-manager, ... }:
+    let
+      system = "x86_64-linux";
+    in {
       nixosConfigurations.nixos = nixpkgs.lib.nixosSystem {
         modules = [
           ./configuration.nix
@@ -22,5 +25,12 @@
           }
         ];
       };
+      devShells."${system}".default = let
+        pkgs = import nixpkgs { inherit system; };
+      in pkgs.mkShell {
+        buildInputs = with pkgs; [
+          nixos-rebuild
+        ];
+      };
     };
 }