{ config, pkgs, ... }:
{
  environment.systemPackages = [
    (pkgs.writeShellApplication {
      name = "nix-cleanup";
      runtimeInputs = with pkgs; [
        coreutils
        util-linux
        findutils
        btrfs-progs
        nix
      ];
      runtimeEnv.DEVICE = config.environment.impermanence.device;
      text = builtins.readFile ./cleanup.sh;
    })
  ];
}