these 3 derivations will be built:
  /nix/store/zjb2n9w0n0d3i4iydafkhlk578vlzgl6-treefmt.toml.drv
  /nix/store/g1zvv4dg6k4iqsl31rzx36qsbfymn7sm-treefmt.drv
  /nix/store/6pajw8357gpkaqr9wjnnj28q4rv509kj-treefmt-check.drv