this derivation will be built:
  /nix/store/sgcbrmz32fxrx91cfqbsvziwc1pw7spk-treefmt.toml.drv
this path will be fetched (3.6 MiB download, 9.1 MiB unpacked):
  /nix/store/3857m6grhqavknf3pzgay1l6wkcyni7c-dyff-1.12.0