this derivation will be built:
  /nix/store/wicsry1gak55h77yq9wjsa1s22dryf7j-iets-langtests.drv
building '/nix/store/wicsry1gak55h77yq9wjsa1s22dryf7j-iets-langtests.drv'
iets-langtests> pass=291 fail=0
iets-langtests> 

upload niks3: ok