these 4 derivations will be built:
  /nix/store/xsjycglz5n5zfjwsf92lw24zwif7zb42-ubuntu-23.04-server-cloudimg-amd64.img-nix-vm-test.qcow2.drv
  /nix/store/942hifj3iypr9af85w1bpkiln5sqhkgn-run-vm-vm.drv
  /nix/store/292vb61qc4phrw5ggcb07gdr34wasfl9-driver-configuration.json.drv
  /nix/store/2hv20mkll9aj7s7kqladb20kwnxbir0h-test-driver.drv
building '/nix/store/292vb61qc4phrw5ggcb07gdr34wasfl9-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/2hv20mkll9aj7s7kqladb20kwnxbir0h-test-driver.drv'

upload niks3: ok