these 3 derivations will be built:
  /nix/store/kxidcj7yjiiwvkiwpqq0m76mjkqmbl46-treefmt.toml.drv
  /nix/store/a0hkksdfc6kbkyya5570d1hz20xd18wk-treefmt.drv
  /nix/store/m96igzq24n475hdjhnmhnllx22fbhmbx-treefmt-check.drv