this derivation will be built:
  /nix/store/mh2y30d6pv8yvbc90csbqhn558vxhzq4-treefmt-check.drv
building '/nix/store/mh2y30d6pv8yvbc90csbqhn558vxhzq4-treefmt-check.drv'
treefmt-check> traversed 519 files
treefmt-check> emitted 355 files for processing
treefmt-check> formatted 355 files (0 changed) in 21.186s

upload niks3: ok