these 2 derivations will be built:
  /nix/store/aylcn7h2fib58sh0wda7gfq5vl1jkjkx-test-drv-canary-actual.drv
  /nix/store/0jqf9xa0cv8jw43gn4c7bv8dmamghwi5-test-drv-canary.drv
building '/nix/store/aylcn7h2fib58sh0wda7gfq5vl1jkjkx-test-drv-canary-actual.drv'
building '/nix/store/0jqf9xa0cv8jw43gn4c7bv8dmamghwi5-test-drv-canary.drv'

upload niks3: ok