these 4 derivations will be built:
  /nix/store/gcvravjpqwx4jfdghcmgxw7cjfrk0sf9-ubuntu-24.04-server-cloudimg-amd64.img-nix-vm-test.qcow2.drv
  /nix/store/g9py0y52ckyvwvsjw6hir9nh3b3wd13p-run-vm-vm.drv
  /nix/store/rfcv0kyh1073l8v96ipbkvcz7w65p7c8-driver-configuration.json.drv
  /nix/store/wmh93flngx8y9k5i7s3g8nlfkwqm3p35-test-driver.drv
building '/nix/store/rfcv0kyh1073l8v96ipbkvcz7w65p7c8-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/wmh93flngx8y9k5i7s3g8nlfkwqm3p35-test-driver.drv'

upload niks3: ok