these 3 derivations will be built:
  /nix/store/p6nwaf135qidvs37g4k4v7pk7gp5743w-treefmt.toml.drv
  /nix/store/r2ab2c8kyr35ry2bwnm7nhjz5qkk5c7c-treefmt.drv
  /nix/store/5kxsy4wwr6z7pn4dnc4z5qc74xrq0qj9-treefmt-check.drv