this derivation will be built:
  /nix/store/ig6ra9n723c4f2p1d03fz35k37fd15qy-iets-langtests.drv
building '/nix/store/ig6ra9n723c4f2p1d03fz35k37fd15qy-iets-langtests.drv'
iets-langtests> pass=291 fail=0
iets-langtests> 

upload niks3: ok