these 3 derivations will be built:
  /nix/store/x171cdknaqhlzn8f1mx8lvg4lfl2w92n-treefmt.toml.drv
  /nix/store/5slkikgqaf16wdhpgi356q87hw04jchp-treefmt.drv
  /nix/store/mrpc0rkibnj1cc8gdsc8wsaa7cxy1wjy-treefmt-check.drv