these 3 derivations will be built:
  /nix/store/5miiw5b0cj12ks2h9xmlwz7hgv3mgw71-treefmt.toml.drv
  /nix/store/np734gs6kkkr40jpmziyr794b1wcnym8-treefmt.drv
  /nix/store/vvcarn7zhv1as4sksikcnj85krgz2frf-treefmt-check.drv