this derivation will be built:
  /nix/store/mfa0papx1khcvpnmg7pczczwlfr2g2j0-iets-langtests.drv
building '/nix/store/mfa0papx1khcvpnmg7pczczwlfr2g2j0-iets-langtests.drv'
iets-langtests> pass=290 fail=0
iets-langtests> 

upload niks3: ok