{
  description = "NixOS Configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-23.11";
                 # ^^^^^^^^^^^^^ this part is optional
    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";

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

  outputs = { self, nixpkgs, nixpkgs-unstable, home-manager, ... }: 
  let
    lib = nixpkgs.lib;
    lib-unstable = nixpkgs-unstable.lib;
    username = "nullbite";

    enableHomeManager = user: home-manager.nixosModules.home-manager {
      home-manager.useGlobalPkgs = true;
      home-manager.useUserPackages = true;
      home-manager.users."${user}" = ./home.nix ; # TODO replace me
    };
  in {
    nixosConfigurations = {
      slab = lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./hosts/slab/configuration.nix
          ./hosts/slab/nvidia-optimus.nix
          ./roles/remote.nix
          ./roles/plasma.nix
          ./fragments/opengl.nix
          ./roles/gaming.nix
        ];
      };
      nullbox = lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./hosts/nullbox/configuration.nix
          ./roles/remote.nix
          ./roles/plasma.nix
          ./fragments/hardware/nvidia-modeset.nix
          ./roles/gaming.nix
        ];
      };
    };
  };
}