these 4 derivations will be built:
  /nix/store/bxbar6p9zm1mycw1a9h2kmrz5nc54p5j-ubuntu-26.04-server-cloudimg-amd64v3.img-nix-vm-test.qcow2.drv
  /nix/store/l622dxkmcrb3rzw51qca0s4jfn529zvl-run-vm-vm.drv
  /nix/store/hpfrv3d0gngqvrfk29186ybssadp19j3-driver-configuration.json.drv
  /nix/store/fms5apj8cxxr79hg7smnqlmx0x7gmbpr-test-driver.drv
building '/nix/store/hpfrv3d0gngqvrfk29186ybssadp19j3-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/fms5apj8cxxr79hg7smnqlmx0x7gmbpr-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok