these 5 derivations will be built:
  /nix/store/7d8smqybvljcp4iad8ri1pld260bmf1v-guestfs-tools-1.52.3.drv
  /nix/store/v9kn0dwiv1hrfhzglmlfxf88x3zxzgvj-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/isbj9fmcs1ssaaygg6j2k12fkplxh36x-run-vm-vm.drv
  /nix/store/s6ijwbr6bihq43zzsz93kwdg8r37zg7c-driver-configuration.json.drv
  /nix/store/nrrlyl3axylvsrribdlrs8kpm7l5wm6x-test-driver.drv
building '/nix/store/v9kn0dwiv1hrfhzglmlfxf88x3zxzgvj-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> [   5.8] 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> [   5.8] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   5.8] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   5.9] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   5.9] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   5.9] Running: /nix/store/79sj99idfnjraik226s1k4ixd2693qsd-run-script
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   6.2] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   6.3] Finishing off
building '/nix/store/isbj9fmcs1ssaaygg6j2k12fkplxh36x-run-vm-vm.drv'
run-vm-vm> structuredAttrs is enabled
building '/nix/store/s6ijwbr6bihq43zzsz93kwdg8r37zg7c-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/nrrlyl3axylvsrribdlrs8kpm7l5wm6x-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok