these 3 derivations will be built:
  /nix/store/jzlj1xp3iw0441abra75l1lmcwp2ww2j-DockerSandboxes-darwin.tar.gz.drv
  /nix/store/xphasdxr41mfhwjqfcjcq7rny3pzx77s-docker-sbx-0.47.0.drv
  /nix/store/qksyhndj1symwhkj09m68p064lfhz5q6-check-docker-sbx.drv