{
  description = "ota.example.com — nix-ota control plane + binary cache";

  inputs = {
    nixpkgs.url  = "github:nixos/nixpkgs?ref=nixos-unstable";
    nix-ota.url  = "git+https://linus.dyrehytten.dk/max/nix-ota";
    nix-ota.inputs.nixpkgs.follows = "nixpkgs";
  };

  outputs = { self, nixpkgs, nix-ota, ... }: {
    nixosConfigurations.ota = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        nix-ota.nixosModules.server
        ./configuration.nix
      ];
    };
  };
}