this derivation will be built:
  /nix/store/n0fr1x3l346njl2kkv3h7mb1sp6vdq1w-treefmt-check.drv
building '/nix/store/n0fr1x3l346njl2kkv3h7mb1sp6vdq1w-treefmt-check.drv'
treefmt-check> traversed 519 files
treefmt-check> emitted 355 files for processing
treefmt-check> formatted 355 files (0 changed) in 3.847s

upload niks3: ok