these 3 derivations will be built:
  /nix/store/lg0qi218vczv1dlna995wr7ay4vl9adi-treefmt.toml.drv
  /nix/store/5hmd1iajvqbc0ikcrwwr3an8h8hrqk6h-treefmt.drv
  /nix/store/fbvjpqrgad2fiz0bsl9n2jibz81h9c08-treefmt-check.drv