this derivation will be built:
  /nix/store/mdifxvaz8sfi51y4v6k8iv2py1dlwr5j-treefmt-check.drv
building '/nix/store/mdifxvaz8sfi51y4v6k8iv2py1dlwr5j-treefmt-check.drv'
treefmt-check> traversed 517 files
treefmt-check> emitted 354 files for processing
treefmt-check> formatted 354 files (0 changed) in 19.195s

upload niks3: ok