{
    description = "NixOS server fleet";

    inputs = {
        nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
        disko.url = "github:nix-community/disko";
    };

    outputs = { self, nixpkgs }:
    let
        system = "x86_64-linux";
        release = "25.11";
        mainDisk = "/dev/sda";
        myUser = "victor";
    in {
        nixosConfigurations = {
            isengard = nixpkgs.lib.nixosSystem {
                inherit system;
                specialArgs = { inherit release mainDisk myUser; };
                modules = [
                    inputs.disko.nixosModules.disko

                    ./hosts/isengard.nix
                    ./modules/base.nix
                    ./modules/docker.nix

                    ({ ... }: {
                        disko.devices = import ./disko/btrfs-legacy.nix {
                            device = mainDisk; 
                        };
                    })
                ];
            };
        };
    };
}