this derivation will be built:
  /nix/store/hs30jlfwwdd8fkdpsv10l22mlj64k84b-xcp.drv
building '/nix/store/hs30jlfwwdd8fkdpsv10l22mlj64k84b-xcp.drv' on 'ssh-ng://nix-remote-builder@rofl-15.brkn.lol'
building '/nix/store/hs30jlfwwdd8fkdpsv10l22mlj64k84b-xcp.drv'
xcp> structuredAttrs is enabled

upload niks3: ok