this derivation will be built:
  /nix/store/5kf1ba2jrasicpisrv9b1szlpvqaw7cz-stack-land.drv
building '/nix/store/5kf1ba2jrasicpisrv9b1szlpvqaw7cz-stack-land.drv' on 'ssh-ng://nixbuild@stibnite-builder'
building '/nix/store/5kf1ba2jrasicpisrv9b1szlpvqaw7cz-stack-land.drv'
stack-land> structuredAttrs is enabled

upload niks3: ok