this derivation will be built:
  /nix/store/7n17wwdwd59fnm87fiw9arlpl2a167cx-iets-langtests.drv
building '/nix/store/7n17wwdwd59fnm87fiw9arlpl2a167cx-iets-langtests.drv'
iets-langtests> pass=291 fail=0
iets-langtests> 

upload niks3: ok