this derivation will be built:
  /nix/store/391x4hbfkg7via6mng423s7n35car96y-treefmt-check.drv
bld4: building 391x4hbfkg7via6mng423s7n35car96y-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 5.923s