these 4 derivations will be built:
  /nix/store/c1iz38da7walj2d5wzczafncazbmyj7j-ubuntu-23.04-server-cloudimg-amd64.img-nix-vm-test.qcow2.drv
  /nix/store/x1flzqdfklg1vj8iad3w6j99w83pa3ga-run-vm-vm.drv
  /nix/store/4dqgb0pvz0fa944ap988gczlsii0ryrc-driver-configuration.json.drv
  /nix/store/ql8wxavagzzf5wgazvb8k2gqbbs2wz03-test-driver.drv
building '/nix/store/4dqgb0pvz0fa944ap988gczlsii0ryrc-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/ql8wxavagzzf5wgazvb8k2gqbbs2wz03-test-driver.drv'

upload niks3: ok