these 3 derivations will be built:
  /nix/store/19azkss6fjr9k2jr7456lippmzla2a1d-treefmt.toml.drv
  /nix/store/cgryzsjdkmqm0zx3d8mnba9da29c15jp-treefmt.drv
  /nix/store/i24s47757kbypsrdlgs8dpmi09kd5f3f-treefmt-check.drv