dcos package install <package> might seem to be unresponsive sometimes. This happens with packages that are docker-ized and is due to docker pull wait time. This has known to impact
Marathon might show
Deploying in the mean time.
Please bear with us and it should complete in 3-5 minutes.
There is an open issue to show progress during the install so that it does not seem to be unresponsive. We track it internally as DCOS-872.