these 3 derivations will be built:
  /nix/store/912f9r3imf1l5vb4ns98g7l9qy8k80y6-treefmt.toml.drv
  /nix/store/v1k44vah5v1d41k3mb3i0yib0gwmjms7-treefmt.drv
  /nix/store/iswjr7yr713i66cr4sh9q99im1mymb2r-treefmt-check.drv