these 2 derivations will be built:
  /nix/store/384467h5q9sm218yjrwysfmspg9mfjn9-test-drv-canary-actual.drv
  /nix/store/8saq311dlawbm1hayg8zpxshlam7k58s-test-drv-canary.drv
building '/nix/store/384467h5q9sm218yjrwysfmspg9mfjn9-test-drv-canary-actual.drv'
building '/nix/store/8saq311dlawbm1hayg8zpxshlam7k58s-test-drv-canary.drv'

upload niks3: ok