these 3 derivations will be built:
  /nix/store/nln3aqcka46nikq6s9y9cn2hfi850vj4-treefmt.toml.drv
  /nix/store/8k0bgs2mfjfn17af0nnhjwam278rjjkl-treefmt.drv
  /nix/store/9ibrgq0sfzhz9jgm0nqhn8fx58i2j78m-treefmt-check.drv