these 3 derivations will be built:
  /nix/store/d3bmmbx3f23zqzzpkq1ndlv2mqaz6krw-treefmt.toml.drv
  /nix/store/pdmhc9k15936xkjnmk82mv3w9m9hqaz5-treefmt.drv
  /nix/store/qmy859fdhsajj88zqwvajxq53kfn10ak-treefmt-check.drv