this derivation will be built:
  /nix/store/2k1yx9qhls09a39qx8qpd2dvih311c0k-treefmt-check.drv
building '/nix/store/2k1yx9qhls09a39qx8qpd2dvih311c0k-treefmt-check.drv'
treefmt-check> treefmt v2.4.0traversed 927 files
treefmt-check> emitted 229 files for processing
treefmt-check> formatted 229 files (0 changed) in 596ms