these 4 derivations will be built:
  /nix/store/hskrgkrbiqf0v4v956b4cd5sjxk452yg-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/kc142qb1v4viv79vbinhc91g3yqnxq1h-run-vm-vm.drv
  /nix/store/p2fw4y7knrfdqn59qr29h26i5qa2vhg7-driver-configuration.json.drv
  /nix/store/jk0fw2drkm629yfkby85risj7hgdy5q4-test-driver.drv
building '/nix/store/hskrgkrbiqf0v4v956b4cd5sjxk452yg-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> [  13.2] 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> [  13.2] Setting the machine ID in /etc/machine-id
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  13.2] Copying: backdoor.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  13.2] Copying: mount-store.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  13.3] Copying: resizeguest.service to /etc/systemd/system
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  13.3] Running: /nix/store/79sj99idfnjraik226s1k4ixd2693qsd-run-script
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  14.1] SELinux relabelling
ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2> [  14.3] Finishing off
building '/nix/store/kc142qb1v4viv79vbinhc91g3yqnxq1h-run-vm-vm.drv'
run-vm-vm> structuredAttrs is enabled
building '/nix/store/p2fw4y7knrfdqn59qr29h26i5qa2vhg7-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/jk0fw2drkm629yfkby85risj7hgdy5q4-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok