these 2 derivations will be built:
  /nix/store/7npp481rqhgmhgkg6awnc9hq0cf58hzr-test-drv-canary-actual.drv
  /nix/store/v6acx9288x68qhsxidqz276sk555ggsd-test-drv-canary.drv
building '/nix/store/7npp481rqhgmhgkg6awnc9hq0cf58hzr-test-drv-canary-actual.drv'
building '/nix/store/v6acx9288x68qhsxidqz276sk555ggsd-test-drv-canary.drv'

upload niks3: ok