these 4 derivations will be built:
  /nix/store/sq3fiadh3dkgcfpj95ldq4g96fz8sgp2-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/33lkypgzvdgg0b7480p5q7j49fqz627z-run-vm-vm.drv
  /nix/store/jigxfb7sd2rma3ay4b4x8xkgjjr9qcc2-driver-configuration.json.drv
  /nix/store/h3260v6b2grxm6bi36021zjyc5rpr2sp-test-driver.drv
building '/nix/store/jigxfb7sd2rma3ay4b4x8xkgjjr9qcc2-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/h3260v6b2grxm6bi36021zjyc5rpr2sp-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok