{
  description = "luodh 的 NixOS 终极配置";

  # 输入（也就是原材料供应链）
  inputs = {
    # 主力系统使用稳定版，保证系统底盘绝对安全不出错
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
    
    # 额外引入 unstable 分支，专门用来提取最新软件
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixos-unstable";

    # 引入 Home Manager (与系统稳定版对应)
    home-manager = {
      url = "github:nix-community/home-manager/release-26.05";
      inputs.nixpkgs.follows = "nixpkgs"; 
    };

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

    spicetify-nix = {
      url = "github:Gerg-L/spicetify-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    noctalia = {
      url = "github:noctalia-dev/noctalia-shell";
      inputs.nixpkgs.follows = "nixpkgs-unstable";
    };

  };

  # 输出（最终建成的系统）
  outputs = { self, nixpkgs, nixpkgs-unstable, home-manager, plasma-manager, noctalia, ... }@inputs: {
    nixosConfigurations = {
      "nixos" = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        # 将 unstable 打包成 pkgs-unstable 注入系统模块
        specialArgs = {
          inherit inputs;
          pkgs-unstable = import nixpkgs-unstable {
            system = "x86_64-linux";
            config.allowUnfree = true;
          };
        };
        modules = [
          # 1. 引入系统底层的硬件和全局配置
          ./configuration.nix
          
          # 二进制缓存加速
          {
            nix.settings = {
              substituters = [ "https://noctalia.cachix.org" ];
              trusted-public-keys = [ "noctalia.cachix.org-1:pCOR47nnMEo5thcxNDtzWpOxNFQsBRglJzxWPp3dkU4=" ];
            };
          }

          # 2. 把 Home Manager 作为系统模块请进来
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            # 同样将 pkgs-unstable 注入给 Home Manager 模块
            home-manager.extraSpecialArgs = { 
              inherit inputs; 
              pkgs-unstable = import nixpkgs-unstable {
                system = "x86_64-linux";
                config.allowUnfree = true;
              };
            };
            home-manager.sharedModules = [
              plasma-manager.homeModules.plasma-manager
              inputs.spicetify-nix.homeManagerModules.default
              noctalia.homeModules.default
            ];

            # ⚠️ 极其重要：把这里的 "luodh" 替换成你在 NixOS 里登录的实际系统用户名
            home-manager.users.luodh = import ./home.nix;
          }

        ];
      };
    };
  };
}