these 4 derivations will be built:
  /nix/store/3ah6kh0q4g85z4h78svpj039xqb1k56s-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/wikzqpxfr3dfaps1x4j7d2hd2qrh3754-run-vm-vm.drv
  /nix/store/00qvhb1k7jfp9sd1hq4ya8mpivkrc2qx-driver-configuration.json.drv
  /nix/store/nk4n7f9f6a71xl9i4g1n91vwwqq6xs5l-test-driver.drv
building '/nix/store/3ah6kh0q4g85z4h78svpj039xqb1k56s-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> [  11.9] 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> [  12.0] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  12.0] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  12.0] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  12.0] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  12.0] Running: /nix/store/gwc0ksfgmqhdr0xhwmyrs4sl5902vjpx-run-script
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  12.5] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  12.8] Finishing off
building '/nix/store/wikzqpxfr3dfaps1x4j7d2hd2qrh3754-run-vm-vm.drv'
run-vm-vm> structuredAttrs is enabled
building '/nix/store/00qvhb1k7jfp9sd1hq4ya8mpivkrc2qx-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/nk4n7f9f6a71xl9i4g1n91vwwqq6xs5l-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok