this derivation will be built:
  /nix/store/fx8gq3bkc7hlc635wbrlfydfdmvph5y4-iets-langtests.drv
building '/nix/store/fx8gq3bkc7hlc635wbrlfydfdmvph5y4-iets-langtests.drv'
iets-langtests> pass=291 fail=0
iets-langtests> 

upload niks3: ok