these 4 derivations will be built:
  /nix/store/5ncs4y2xrfyb3q463v4sg7v6nw9imhwr-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/yn4kwwhs78h84dljfkqqq8m6fb08q0b0-run-vm-vm.drv
  /nix/store/nkjj7ij8gnh52x386iagifwhp7ncq97v-driver-configuration.json.drv
  /nix/store/x1m68y95g226z9q970gzavvm3g1hy46f-test-driver.drv
building '/nix/store/5ncs4y2xrfyb3q463v4sg7v6nw9imhwr-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> [   7.3] 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> [   7.4] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   7.4] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   7.4] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   7.5] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   7.5] Running: /nix/store/79sj99idfnjraik226s1k4ixd2693qsd-run-script
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.0] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [   8.2] Finishing off
building '/nix/store/yn4kwwhs78h84dljfkqqq8m6fb08q0b0-run-vm-vm.drv'
run-vm-vm> structuredAttrs is enabled
building '/nix/store/nkjj7ij8gnh52x386iagifwhp7ncq97v-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/x1m68y95g226z9q970gzavvm3g1hy46f-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok