these 3 derivations will be built:
  /nix/store/rkvs7wlfh9myrfaqlxkbj26l7m661jn5-treefmt.toml.drv
  /nix/store/kgz4qm205d91iz59cz703lj4ls9ba8hs-treefmt.drv
  /nix/store/0i86j2nkfcsj7n4zckdy714jhv23rl26-treefmt-check.drv