these 4 derivations will be built:
  /nix/store/pppw6adz4bsq82nfrp81qy4nqmya1zlz-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/89nca71j5w30lkb2623km4fmvsqpinkc-run-vm-vm.drv
  /nix/store/i5gys3v8bndg5sd609x854awagk5fxqx-driver-configuration.json.drv
  /nix/store/ys0rpifchrzcq04766fjly3nw42vwhbm-test-driver.drv
building '/nix/store/pppw6adz4bsq82nfrp81qy4nqmya1zlz-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> [   9.5] 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> [   9.6] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   9.6] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   9.6] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   9.6] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   9.6] Running: /nix/store/gwc0ksfgmqhdr0xhwmyrs4sl5902vjpx-run-script
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  10.3] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  10.5] Finishing off
building '/nix/store/89nca71j5w30lkb2623km4fmvsqpinkc-run-vm-vm.drv'
run-vm-vm> structuredAttrs is enabled
building '/nix/store/i5gys3v8bndg5sd609x854awagk5fxqx-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/ys0rpifchrzcq04766fjly3nw42vwhbm-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok