{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
    sops-nix.url = "github:Mic92/sops-nix";
    sops-nix.inputs.nixpkgs.follows = "nixpkgs";
    checker.url = "git+https://codeberg.org/oibot/checker.git";
    hermes-agent.url = "github:NousResearch/hermes-agent";
  };

  outputs = { self, nixpkgs, sops-nix, checker, hermes-agent, ... }:
    let
      system = "x86_64-linux";
    in {
      nixosConfigurations.tobserver = nixpkgs.lib.nixosSystem {
        inherit system;

        specialArgs = {
          inherit checker;
        };

        modules = [
          sops-nix.nixosModules.sops
          ./hardware-configuration.nix
          ./configuration.nix
          ./modules/bitcoin.nix
          ./modules/electrs.nix
          ./modules/mempool.nix
          ./modules/nextcloud.nix
          ./modules/totap.nix
          ./modules/checker.nix
          hermes-agent.nixosModules.default
          ./modules/hermes-agent.nix
        ];
      };
    };
}