this derivation will be built:
  /nix/store/y2h1abi1a2ymd7gp4hjj6m2abfh69v2b-treefmt-check.drv
building '/nix/store/y2h1abi1a2ymd7gp4hjj6m2abfh69v2b-treefmt-check.drv'
treefmt-check> treefmt v2.5.0traversed 21 files
treefmt-check> emitted 10 files for processing
treefmt-check> formatted 10 files (0 changed) in 78ms