{ pkgs, ... }:

let
  cb-mount = pkgs.writeScriptBin "cb-mount" ''
  #!${pkgs.bash}/bin/bash

  DEVICE=/dev/disk/by-path/pci-0000:00:12.0-ata-2-part1

  ${pkgs.cryptsetup}/bin/cryptsetup luksOpen ''${DEVICE} external-drive
  mkdir -p /mnt/external-drive
  mount /dev/mapper/external-drive /mnt/external-drive
  '';

  cb-unmount = pkgs.writeScriptBin "cb-unmount" ''
  #!${pkgs.bash}/bin/bash

  umount /mnt/external-drive
  ${pkgs.cryptsetup}/bin/cryptsetup luksClose external-drive
  '';

in {
  environment.systemPackages = [ cb-mount cb-unmount ];
}