this derivation will be built:
  /nix/store/9yw1zpyz8x34asbhhd48jaxk125v02jh-repo-sync.drv
building '/nix/store/9yw1zpyz8x34asbhhd48jaxk125v02jh-repo-sync.drv' on 'ssh-ng://nixbuild@stibnite-builder'
building '/nix/store/9yw1zpyz8x34asbhhd48jaxk125v02jh-repo-sync.drv'
repo-sync> structuredAttrs is enabled

upload niks3: ok