{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
    headscale.url = "github:juanfont/headscale";
    headplane = {
      url = "github:dahjah/headplane";
      inputs.nixpkgs.follows = "nixpkgs";  # Add dependency tracking
    };
  };

  outputs = { self, nixpkgs, headscale, headplane, ... }@inputs: {
    nixosConfigurations.headscale = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      modules = [
        ./configuration.nix
        ./hardware-configuration.nix
        ./headscale.nix
        headplane.nixosModules.headplane  # Changed to default
      ];
      specialArgs = { inherit inputs; };
    };
  };
}