this derivation will be built:
  /nix/store/ms7fa7sa3jzdr0913cyy5wzv3h68bm0n-treefmt-check.drv
bld4: building ms7fa7sa3jzdr0913cyy5wzv3h68bm0n-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 5.437s