{ config, pkgs, ... }:

let
  emacsOverlaySha256 = "05mzc9a7g3ha7j2wjlbbsnm16yaj1j6nhv24x2jy0iv0r8cgmigc";
in
{
  home-manager.backupFileExtension = "nix-backup";
  nixpkgs = {
    config = {
      allowUnfree = true;
      allowBroken = true;
      allowInsecure = false;
      allowUnsupportedSystem = true;
      permittedInsecurePackages = [
        "electron-39.8.10"
      ];
    };

    overlays =
      let path = ../../overlays; in with builtins;
      map (n: import (path + ("/" + n)))
          (filter (n: match ".*\\.nix" n != null ||
                      pathExists (path + ("/" + n + "/default.nix")))
                  (attrNames (readDir path)))

      ++ [(import (builtins.fetchTarball {
               url = "https://github.com/nix-community/emacs-overlay/archive/master.tar.gz";
               sha256 = emacsOverlaySha256;
           }))
           ];
  };
}