this derivation will be built:
  /nix/store/6fdbp34sw4aazl06z0kg2h142dqkvcah-treefmt-check.drv
bld4: building 6fdbp34sw4aazl06z0kg2h142dqkvcah-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 12.972s