these 4 derivations will be built:
  /nix/store/npnyhhvyn64j76c3x6bh96c5z6n3jzm9-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/v2819y933zmkndhhvzlnpnnq859pspym-run-vm-vm.drv
  /nix/store/cipjqavk6d0lc4r20n9p471bhbbmcxws-driver-configuration.json.drv
  /nix/store/8fckf9amchafnnxqixbz3rd17sgyk1j6-test-driver.drv
building '/nix/store/npnyhhvyn64j76c3x6bh96c5z6n3jzm9-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv'
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   0.0] Examining the guest ...
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   7.9] Setting a random seed
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> virt-customize: warning: random seed could not be set for this type of 
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> guest
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.0] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.0] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.0] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.0] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.1] Running: /nix/store/9j2pmjmdm6pv8crd7jbma18vckw8az65-run-script
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.6] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.7] Finishing off
building '/nix/store/v2819y933zmkndhhvzlnpnnq859pspym-run-vm-vm.drv'
building '/nix/store/cipjqavk6d0lc4r20n9p471bhbbmcxws-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/8fckf9amchafnnxqixbz3rd17sgyk1j6-test-driver.drv'

upload niks3: ok