console script is not verbose enough

I just tried to install a package via ./console package --install quiqqer/piwik.
After some time the following was displayed:

Das Paket 1 wird gesucht und installiert

Not sure why it's German and not English but that doesn't matter right now.

After a even longer time I got this success message:

Everything is done. Thank you for using QUIQQER

After checking the administration, the filesystem and the composer.json I couldn't find the package anywhere.

Therefore here are two issues:

1. The console didn't tell me that something went wrong
2. (Why couldn't the package be installed?)