{ pkgs, ... }:
{
  environment.systemPackages = [
    (pkgs.writeShellApplication {
      name = "backup";
      runtimeInputs = with pkgs; [
        btrfs-progs
        coreutils-full
        util-linux
      ];
      text = builtins.readFile ./backup.sh;
    })
  ];

  home-manager.sharedModules = [
    { programs.zsh.initExtra = builtins.readFile ./backup.completion.zsh; }
  ];
}