this derivation will be built:
  /nix/store/y5r4px2080lxcshs4iqa6yqly7jnyd6v-iets-langtests.drv
building '/nix/store/y5r4px2080lxcshs4iqa6yqly7jnyd6v-iets-langtests.drv'
iets-langtests> pass=290 fail=0
iets-langtests> 

upload niks3: ok