this derivation will be built:
  /nix/store/0cpx60cbmf59955l31br4b4r28c7b04x-treefmt-check.drv
bld4: building 0cpx60cbmf59955l31br4b4r28c7b04x-treefmt-check.drv
traversed 517 files
emitted 354 files for processing
formatted 354 files (0 changed) in 6.034s