python & npm Nix flake from Mac system

flake.nix

{
  description = "A very basic flake";

  inputs = {
    nixpkgs.url = "nixpkgs/24.05";
  };

  outputs = { self, nixpkgs }: 
    let system = "aarch64-darwin";
    in 
  {

    devShells.${system}.default = 
      let
        pkgs = nixpkgs.legacyPackages.aarch64-darwin;
      in pkgs.mkShell
    {
       packages = [
          pkgs.python3
          pkgs.nodejs
       ];
     };
    };

}