this derivation will be built:
  /nix/store/yy0ynlh44vw4lxchv7ypbpmryg3wxai5-check-bernstein.drv
building '/nix/store/yy0ynlh44vw4lxchv7ypbpmryg3wxai5-check-bernstein.drv'

upload niks3: ok