this derivation will be built:
  /nix/store/6iik0mr6zc7jgkgdl9dr144ndp5z6avc-treefmt-check.drv
bld4: building 6iik0mr6zc7jgkgdl9dr144ndp5z6avc-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 19.852s