these 4 derivations will be built:
  /nix/store/wnwhdmsgsxa5w9dsm6hq3pqaapagixrr-ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2.drv
  /nix/store/xida2v8v9n761iiw7k1k44dgf440m59q-run-vm-vm.drv
  /nix/store/gibivaf0n9j9xxj8z7172v6ib7g9w3cc-driver-configuration.json.drv
  /nix/store/ysb76yxchpivlmpk80i913f9xw6himq7-test-driver.drv
building '/nix/store/wnwhdmsgsxa5w9dsm6hq3pqaapagixrr-ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2.drv'
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   0.0] Examining the guest ...
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.4] Setting a random seed
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> virt-customize: warning: random seed could not be set for this type of 
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> guest
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.5] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.5] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.5] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.5] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.5] Running: /nix/store/ak16ynrwy8ri9gk46j5vpdyq319c6vi4-run-script
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.8] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64.img-nix-vm-test.qcow2> [   5.9] Finishing off
building '/nix/store/xida2v8v9n761iiw7k1k44dgf440m59q-run-vm-vm.drv'
building '/nix/store/gibivaf0n9j9xxj8z7172v6ib7g9w3cc-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/ysb76yxchpivlmpk80i913f9xw6himq7-test-driver.drv'

upload niks3: ok