these 3 derivations will be built:
  /nix/store/zdccl9q3brjy4vyb7ii6ppihzplmsbkn-treefmt.toml.drv
  /nix/store/isc6fj3kfsmsdkmgf7dznip1wnh67qbv-treefmt.drv
  /nix/store/mjd56rfig911fvd7am4gq96vgfd0qa8k-treefmt-check.drv