{ overlays ? [] } @ args:

let
  inherit (builtins) attrNames filter match pathExists readDir;

  path = ./overlays;

  overlayPaths =
    filter
      (n: match ".*\\.nix" n != null || pathExists (path + "/${n}/default.nix"))
      (attrNames (readDir path));

in
  import ./nixpkgs (args // {
    overlays = (map (n: import (path + "/${n}")) overlayPaths) ++ overlays;
  })