this derivation will be built:
  /nix/store/r1h31x9vc8ak8gq7lz4if6fsg31nb3yr-treefmt-check.drv
building '/nix/store/r1h31x9vc8ak8gq7lz4if6fsg31nb3yr-treefmt-check.drv'
treefmt-check> traversed 553 files
treefmt-check> emitted 374 files for processing
treefmt-check> formatted 374 files (0 changed) in 7.387s

upload niks3: ok