these 3 derivations will be built:
  /nix/store/jwyzdy45rn5j5mw99b86lr60p992xgsw-treefmt.toml.drv
  /nix/store/1l3k37an2d6nmb2q1qfhj3jkvd8r28hk-treefmt.drv
  /nix/store/g30nd1wyqhkg8pb7kb86qngdlppscmlc-treefmt-check.drv
this path will be fetched (6.1 MiB download, 18.2 MiB unpacked):
  /nix/store/3by2v89g155hqy2sw480jhlwrvsx3pxv-rumdl-0.2.37