{
  inputs = {
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable-small";
    home-manager = {
      url = "github:nix-community/home-manager/master";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    wayland-pipewire-idle-inhibit = {
      url = "github:rafaelrc7/wayland-pipewire-idle-inhibit";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs@{
    self,
      nixpkgs,
      nix,
      nixos-hardware,
      home-manager,
      wayland-pipewire-idle-inhibit,
      ...
  }:
    let
      inherit (self) outputs;
      lib = nixpkgs.lib // home-manager.lib;
      systems = [ "x86_64-linux" "aarch64-linux" ];
      forEachSystem = f: lib.genAttrs systems (system: f pkgsFor.${system});
      pkgsFor = lib.genAttrs systems (system: import nixpkgs {
        inherit system;
        config.allowUnfree = true;
      });
    in
    {
      inherit lib;
      # nixosModules = import ./modules/nixos;
      # homeManagerModules = import ./modules/home-manager;
      # templates = import ./templates;

      # overlays = import ./overlays { inherit inputs outputs; };

      # packages = forEachSystem (pkgs: import ./pkgs { inherit pkgs; });
      # devShells = forEachSystem (pkgs: import ./shell.nix { inherit pkgs; });
      # formatter = forEachSystem (pkgs: pkgs.nixpkgs-fmt);

      nixosConfigurations = {
        # clients
        ace = lib.nixosSystem {
          modules = [ ./hosts/ace ];
          specialArgs = { inherit inputs outputs; };
        };
        dragon = lib.nixosSystem {
          modules = [ ./hosts/dragon ];
          specialArgs = { inherit inputs outputs; };
        };
        eve = lib.nixosSystem {
          modules = [ ./hosts/eve ];
          specialArgs = { inherit inputs outputs; };
        };
        loki = lib.nixosSystem {
          modules = [
            nixos-hardware.nixosModules.dell-xps-13-9310
            ./hosts/loki
            ];
          specialArgs = { inherit inputs outputs; };
        };
        pocket2 = lib.nixosSystem {
          modules = [ ./hosts/pocket2 ];
          specialArgs = { inherit inputs outputs; };
        };
        smaug = lib.nixosSystem {
          modules = [
            nixos-hardware.nixosModules.lenovo-thinkpad-x260
            ./hosts/smaug
            ];
          specialArgs = { inherit inputs outputs; };
        };
        # t2 = lib.nixosSystem {
        #   modules = [ ./hosts/t2 ];
        #   specialArgs = { inherit inputs outputs; };
        # };

        # servers
        display = lib.nixosSystem {
          modules = [ ./hosts/display ];
          specialArgs = { inherit inputs outputs; };
        };
        fred = lib.nixosSystem {
          modules = [ ./hosts/fred ];
          specialArgs = { inherit inputs outputs; };
        };
        harper2 = lib.nixosSystem {
          modules = [ ./hosts/harper2 ];
          specialArgs = { inherit inputs outputs; };
        };
        harper = lib.nixosSystem {
          modules = [ ./hosts/harper ];
          specialArgs = { inherit inputs outputs; };
        };
        nuwww = lib.nixosSystem {
          modules = [ ./hosts/nuwww ];
          specialArgs = { inherit inputs outputs; };
        };
        pihole = lib.nixosSystem {
          modules = [ ./hosts/pihole ];
          specialArgs = { inherit inputs outputs; };
        };
        www2 = lib.nixosSystem {
          modules = [ ./hosts/www2 ];
          specialArgs = { inherit inputs outputs; };
        };

        # test system
        nixos = lib.nixosSystem {
          modules = [ ./hosts/nixos ];
          specialArgs = { inherit inputs outputs; };
        };
      };
    };
}