{
  nixpkgs,
  unstable,
  ...
}: let
  inherit (nixpkgs.lib) composeManyExtensions;
  inherit (builtins) attrNames readDir;
  localOverlays =
    map
    (f: import (./default + "/${f}"))
    (attrNames (readDir ./default));
in
  composeManyExtensions localOverlays