{
  description = "NixOS configuration";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";
    sops-nix.url = "github:Mic92/sops-nix";
    nixpkgs-23-11.url = "github:nixos/nixpkgs/nixos-23.11";
  };

  outputs = inputs@{ nixpkgs, nixpkgs-23-11, home-manager, sops-nix, arion, ... }: {
    nixosConfigurations = {
      rackserver = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./configuration.nix
          sops-nix.nixosModules.sops
         
          # https://github.com/hercules-ci/arion/issues/230
          ({pkgs, ...}: 
          {
            nixpkgs.overlays = [ (final: prev: { arion = nixpkgs-23-11.legacyPackages.x86_64-linux.arion; }) ];
          })

          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.users.ku = import ./users/ku.nix;
            home-manager.users.nub = import ./users/nub.nix;
            home-manager.users.jas = import ./users/jas.nix;
            home-manager.users.sky = import ./users/sky.nix;
            home-manager.users.podman = import ./users/podman.nix;

            # Optionally, use home-manager.extraSpecialArgs to pass
            # arguments to home.nix
          }
        ];
      };
    };
  };
}