these 4 derivations will be built:
  /nix/store/mwiih5wsdr2bljq241xd4zw0jbg2jk55-ubuntu-22.04-server-cloudimg-amd64.img-nix-vm-test.qcow2.drv
  /nix/store/rld06qhs1df5f4fvvr9xar3p7dcnnmhb-run-vm-vm.drv
  /nix/store/hw3yyg0yz84vqn6zhyp3wy4qfw12ml5y-driver-configuration.json.drv
  /nix/store/mkljkz1mw41cp6b7sxf554sv7ra51fm0-test-driver.drv
building '/nix/store/hw3yyg0yz84vqn6zhyp3wy4qfw12ml5y-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/mkljkz1mw41cp6b7sxf554sv7ra51fm0-test-driver.drv'

upload niks3: ok