{ nixpkgs, self, ... } @ inputs:

let
  inherit (nixpkgs) lib;
in rec {

  mkSystems = builtins.mapAttrs (hostName: cfg: lib.nixosSystem {
    inherit (cfg) system;
    specialArgs = {inherit self inputs;};
    modules = [
      {
        networking = {inherit hostName;};
        nixpkgs.hostPlatform = cfg.system;
      }

      self.nixosModules.default

      cfg.module
    ];
  });

  recReadDir = startDir: dir: lib.concatMapAttrs (file: type: let
    fullFile = "${dir}/${file}";
  in
    if type == "directory" then recReadDir startDir fullFile
    else {${fullFile} = "${startDir}/${fullFile}";}
  ) (builtins.readDir "${startDir}/${dir}");

  filterNixReadDir = dir: lib.filterAttrs (name: _:
    builtins.match ".*\\.nix" name == null
  ) (recReadDir dir ".");

}