{
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
    stable.url = "nixpkgs/nixos-23.05";

    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs @ { self, nixpkgs, ... }: {
    nixosConfigurations = {
      lenovo = nixpkgs.lib.nixosSystem rec {
        system = "x86_64-linux";
        specialArgs = { inherit system inputs; };

        modules = [
          ./modules/preserve-system.nix
          ./modules/core.nix
          ./modules/user
          ./systems/lenovo.nix
        ];
      };
    };
  };
}