this derivation will be built:
  /nix/store/ygx63xy3j7av0j0xxj155addw780jnxf-iets-langtests.drv
building '/nix/store/ygx63xy3j7av0j0xxj155addw780jnxf-iets-langtests.drv'
iets-langtests> pass=291 fail=0
iets-langtests> 

upload niks3: ok