{
  lib,
  config,
  myPkgs,
  pkgs,
  ...
}: let
  cfg = config.soispha.nixpkgs;

  myPkgsOverlay = self: super: myPkgs;
in {
  options.soispha.nixpkgs = {
    enable = lib.mkEnableOption "Nixpkgs config";
    systemName = lib.mkOption {
      description = "The name of the system.";
      example = "x86_64-linux";
      type = lib.types.str;
    };
  };
  config = {
    nixpkgs = lib.mkIf cfg.enable {
      hostPlatform = cfg.systemName;
      config = {
        hostSystem = cfg.systemName;
        overlays = [
          myPkgsOverlay
        ];
        config = {
          # TODO: this fails because of the root tempsize, which should be increased
          # contentAddressedByDefault = true;

          allowUnfreePredicate = pkg:
            builtins.elem (lib.getName pkg) [
              "pypemicro" # required by pynitrokey
            ];
        };
      };
    };
  };
}