these 3 derivations will be built:
  /nix/store/5b9k08ylbd3hdndz1r0nmc79iw0svd2v-treefmt.toml.drv
  /nix/store/pn8agf4wx4ibqvc5ksdhaix0pap9qiij-treefmt.drv
  /nix/store/1g9chfsvv8w54w3iq0pz9jyn2f4pqbiy-treefmt-check.drv
this path will be fetched (968.2 KiB download, 2.3 MiB unpacked):
  /nix/store/0f0g5la9rwy8m33p9hymp67ad6krkk4f-nixfmt-rs-0.4.1