this derivation will be built:
  /nix/store/ah8mqgfnjiq7wqkd2k5lylf1yycnqi9g-nix-shell.drv
this path will be fetched (0.0 KiB download, 20.8 MiB unpacked):
  /nix/store/wb4ab4wpmdj7g8pfkixk3af3d7zlj95g-slack-cli-4.10.0