Wrong pychromecast version for 0.66

Installed 0.66 as a problem that ha couln’t update nest to the right version. I installed nest by hand here and it was a different version than HA wanted. Now it asks the same with pychromecast.

2018-03-31 20:14:39 ERROR (SyncWorker_16) [homeassistant.util.package] Unable to install package pychromecast==2.1.0: Exception:

Manual install by calling pip3 install pychromecast did not give me the correct version.

Why can’t it install these packages an how to fix this?