these 3 derivations will be built:
  /nix/store/d5fy05zi7g2n93yhjjmh2al3k69vlbs8-treefmt.toml.drv
  /nix/store/j9dy07is2060syk2klmpiid4h1bi8zxl-treefmt.drv
  /nix/store/9jr3y9jiig8zsw4kf7f85rpsn9fd05d8-treefmt-check.drv