this derivation will be built:
  /nix/store/6r5g2xif9l2kmnqj785yx2ib2djqxcba-check-paperclip.drv
building '/nix/store/6r5g2xif9l2kmnqj785yx2ib2djqxcba-check-paperclip.drv'

upload niks3: ok