these 3 derivations will be built:
  /nix/store/jcxmq3cwxvxaisjk8hav92mj635wcm70-treefmt.toml.drv
  /nix/store/l9zxbmzdgry53dcxazhhimbif4ygsnqx-treefmt.drv
  /nix/store/6y1aqchwv3rdjhllraj7bfhifc7fyfm6-treefmt-check.drv