{
  description = "nokia-auto-vpn flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs = { self, nixpkgs, ... }:
    let
      pkgs = import nixpkgs { system = "x86_64-linux"; };

      # build the package once and reuse the value
      vpnPkg = pkgs.callPackage ./package.nix {};
    in
    {
      packages.x86_64-linux = {
        nokia-auto-vpn = vpnPkg;
      };

      # make the flake's default package point to the same derivation
      defaultPackage.x86_64-linux = vpnPkg;
    };
}