these 2 derivations will be built:
  /nix/store/6rifngx88ispqhqbhr2ndd474nha9byw-driver-configuration.json.drv
  /nix/store/s2ca3cwxzi4987kr8680cggwm18fsh2r-test-driver.drv
building '/nix/store/6rifngx88ispqhqbhr2ndd474nha9byw-driver-configuration.json.drv'
driver-configuration.json> structuredAttrs is enabled
building '/nix/store/s2ca3cwxzi4987kr8680cggwm18fsh2r-test-driver.drv'
test-driver> structuredAttrs is enabled

upload niks3: ok