these 3 derivations will be built:
  /nix/store/ypp35r79xlzw9d00b8l0aj1i56dxq5rx-DockerSandboxes-linux-amd64.tar.gz.drv
  /nix/store/rawpyd283kjlgyjwyfy4g7pqz8aqgrl4-docker-sbx-0.49.2.drv
  /nix/store/wvwqgfihcvj4nkc8zsvq8gg3mj0v20wr-check-docker-sbx.drv