this derivation will be built:
  /nix/store/xkqivp0ia2hjb4ikflmkv718qm529s3k-iets-langtests.drv
building '/nix/store/xkqivp0ia2hjb4ikflmkv718qm529s3k-iets-langtests.drv'
iets-langtests> pass=290 fail=0
iets-langtests> 

upload niks3: ok