these 3 derivations will be built:
  /nix/store/gp1v6c4gz5pw766gpdzs4psgzj5jmnp0-DockerSandboxes-linux-amd64.tar.gz.drv
  /nix/store/0ikpvmil7ijl4vmipg150171xdprp0zc-docker-sbx-0.48.0.drv
  /nix/store/15hchd0crg8a4s27gy74ar4hbvc2nxmi-check-docker-sbx.drv