these 3 derivations will be built:
  /nix/store/qg6gswq8lzgwl56ms462q3z1p9abgzsh-treefmt.toml.drv
  /nix/store/p4fdvqmyf38cfaf7dlqmp4fbjlrmg3l9-treefmt.drv
  /nix/store/36598mqxm1fbkpp8yk06lxzgc2kxkq8l-treefmt-check.drv