these 3 derivations will be built:
  /nix/store/8zs7f0hd9r5cs0v07gh6s2j8i5dbddy0-treefmt.toml.drv
  /nix/store/2jps5ib7ngampqpx87052v4y1ig18hz0-treefmt.drv
  /nix/store/n6y1phgdj7a3xsy9njaz3hh8lqiki8r2-treefmt-check.drv