these 3 derivations will be built:
  /nix/store/icx2kl87ivj4ra0mzr4pkl3wj6c00mh5-treefmt.toml.drv
  /nix/store/pq71pr223x4n01s850jkdqvzwfrqayx6-treefmt.drv
  /nix/store/9i7wryjscgwhjy6503i8czc1chf8nkbq-treefmt-check.drv