Rewrite my ./generated/modules/traveldroid/system/bluetooth.nix  to integrate nicely with my existing flake.nix en host.nix
Avoid infinite recursion
Just look at how to rewrite this, ignore previous interactions around this nix.
Solve the error. That is really important.
Look at hyprland.nix to see how to avoid the home error


------------------------------------------------------------------------

{ config, pkgs, ... }:

{
  ############################
  # Bluetooth hardware
  ############################
  hardware.bluetooth = {
    enable = true;        # turn on the daemon
    powerOnBoot = true;   # auto-power on
    package = pkgs.bluez; # singular, not a list
  };

  ############################
  # GUI Bluetooth manager
  ############################
  environment.systemPackages = with pkgs; [
    blueman       # graphical Bluetooth manager
  ];

  ############################
  # PipeWire for Bluetooth audio
  ############################
  # services.pipewire.enable = true;
}


------------------------------------------------------------------------

flake.nix

{
  description = "Droidnix: A dendritic NixOS + Home Manager configuration";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    import-tree.url = "github:vic/import-tree";

    stylix = {
      url = "github:nix-community/stylix";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    zen-browser = {
      url = "github:youwen5/zen-browser-flake";
      inputs.nixpkgs.follows = "nixpkgs";
    };

    hyprland.url = "github:hyprwm/Hyprland";
  };

  outputs = { self, nixpkgs, home-manager, import-tree, stylix, hyprland, zen-browser, ... }:
    let
      system = "x86_64-linux";
      flakeRoot = self;
    in {
      nixosConfigurations = {
        traveldroid = nixpkgs.lib.nixosSystem {
          inherit system;

          modules = [
            ./generated/hosts/traveldroid/host.nix
          ];

          specialArgs = {
            inherit flakeRoot;
            inherit home-manager import-tree stylix hyprland zen-browser;
          };
        };
      };
    };
}

------------------------------------------------------------------------

host.nix

{ lib, config, pkgs, flakeRoot, import-tree, home-manager, ... }:

let
  hostname = "traveldroid";

  modulesPath = "${flakeRoot}/generated/modules/${hostname}";
  usersPath   = "${flakeRoot}/generated/users";

  hostModules = import-tree modulesPath;
  globalUsers = import-tree usersPath;

  allModules = hostModules.imports ++ globalUsers.imports;

in
{
  #################################
  # Core system config
  #################################

  networking.hostName = hostname;
  system.stateVersion = "26.05";

  #################################
  # Imports
  #################################

  imports =
    [
      ./boot.nix
      ./hardware-configuration.nix

      # REQUIRED for Home Manager
      home-manager.nixosModules.home-manager
    ]
    ++ allModules;

  #################################
  # Home Manager integration
  #################################

  home-manager.useGlobalPkgs = true;
  home-manager.useUserPackages = true;
}


hyprland.Nix


{ lib, config, pkgs, flakeRoot, home-manager, inputs, ... }:

let
  username = config.defaultUser or "henrov";
  assetPath = "${flakeRoot}/assets/traveldroid/conf/hypr/";

  # Read all files in the asset directory
  assetFiles = builtins.attrNames (builtins.readDir assetPath);

  # Convert files to Home Manager xdg config entries
  hyprFiles = lib.genAttrs assetFiles (f: {
    # Destination path in home directory
    name = ".config/hypr/${f}";
    # Source file path
    value = { source = "${assetPath}/${f}"; };
  });

  # Determine Hyprland package
  hyprlandPkg =
    pkgs.hyprland or
    pkgs.hyprland-git or
    inputs.hyprland.packages.${pkgs.system}.default;
in
{
  environment.systemPackages = [ hyprlandPkg ];

  _module.args.hmUsers = {
    ${username} = {
      home.packages = [ hyprlandPkg ];

      # Merge all files in the asset folder into ~/.config/hypr/
      home.file = lib.mkMerge hyprFiles;

      # Optional: Hyprland settings
      settings.general."col.active_border" = "0xff97cbcd 0xff89b4fa";
    };
  };
}