{ final, prev, ... }: {
  the-powder-toy = prev.callPackage
    (prev.fetchurl {
      url = "https://raw.githubusercontent.com/NixOS/nixpkgs/9863d8c74a959d73df0c495a55097f804f7b379d/pkgs/by-name/th/the-powder-toy/package.nix";
      hash = "sha256-po6jhmdV+HNZBq4/vy6uQsDuW6PyvKcvysWNPZn4K7I=";
    })
    { };
}