this derivation will be built:
  /nix/store/ls2kv9j9smvjwqlfxz8ivkd2z0rmb9cj-treefmt-check.drv
building '/nix/store/ls2kv9j9smvjwqlfxz8ivkd2z0rmb9cj-treefmt-check.drv'
treefmt-check> treefmt v2.6.0traversed 72 files
treefmt-check> emitted 50 files for processing
treefmt-check> formatted 50 files (0 changed) in 122ms