{
  description = "whc NixOS — desktop (i7-12700F + RTX 4060)";

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

  outputs =
    { self, nixpkgs, ... }:
    let
      system = "x86_64-linux";
    in
    {
      nixosConfigurations.desktop = nixpkgs.lib.nixosSystem {
        inherit system;
        modules = [ ./hosts/desktop ];
      };

      # 无 flake 时也可：把本仓库拷到 /etc/nixos 后 nixos-rebuild switch
      formatter.${system} = nixpkgs.legacyPackages.${system}.nixfmt-rfc-style;
    };
}