this derivation will be built:
  /nix/store/53czg8b3bjnfh4hiwh6yq4c4nbm9wj5y-iets-langtests.drv
building '/nix/store/53czg8b3bjnfh4hiwh6yq4c4nbm9wj5y-iets-langtests.drv'
iets-langtests> pass=291 fail=0
iets-langtests> 

upload niks3: ok