{
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    nextcloud = {
      url = "github:onny/nixos-nextcloud-testumgebung";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    gtrackmap = {
      url = "github:gtrackmap/gtrackmap";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs = { self, nixpkgs, gtrackmap, ... }@attrs: {
    nixosConfigurations.freun-dev = nixpkgs.lib.nixosSystem {
      system = "x86_64-linux";
      specialArgs = attrs;
      modules = [
        ./hardware-configuration.nix
        ./configuration.nix
        ./services.nix
        gtrackmap.nixosModules.x86_64-linux.default
      ];
    };
  };
}