this derivation will be built:
  /nix/store/p801xci165dnz5f5p16s88i1ck0l2qih-stack-land.drv
building '/nix/store/p801xci165dnz5f5p16s88i1ck0l2qih-stack-land.drv'
stack-land> structuredAttrs is enabled

upload niks3: ok