{
  description = "NixOS configuration";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-24.11";
    update.url = "github:nixos/nixpkgs/nixos-24.11";
    unstable.url = "github:nixos/nixpkgs/nixos-unstable";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    home-manager = {
      url = "github:nix-community/home-manager/release-24.11";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs@{ nixpkgs, home-manager, unstable, update, nixos-hardware, ... }:
    let
      system = "x86_64-linux";
      pkgs = nixpkgs.legacyPackages.${system};
      unstablePkgs = unstable.legacyPackages.${system};
      updatePkgs = import update { inherit system; config.allowUnfree = true; };
    in {
      nixosConfigurations = {
        sandy = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = { inherit unstablePkgs updatePkgs nixos-hardware; };
          modules = [
            ./hosts/sandy/configuration.nix
            home-manager.nixosModules.home-manager
            {
              home-manager = {
                useGlobalPkgs = true;
                useUserPackages = true;
                users.nshields = import ./home.nix;
                extraSpecialArgs = {
                  inherit unstablePkgs;
                };
              };
            }
          ];
        };

        axl = nixpkgs.lib.nixosSystem {
          system = "x86_64-linux";
          specialArgs = { inherit unstablePkgs updatePkgs nixos-hardware; };
          modules = [
            ./hosts/axl/configuration.nix
            home-manager.nixosModules.home-manager
            {
              home-manager = {
                useGlobalPkgs = true;
                useUserPackages = true;
                users.nshields = import ./home.nix;
                extraSpecialArgs = {
                  inherit unstablePkgs;
                };
              };
            }
          ];
        };
      };
    };
}