When running sudo jspm update I'm getting:
err Error locating github:component/global/archive/v2.0.1.tar.gz.
I was able to get rid by including a reference to socket.io-client from github insead of npm in my jspm dependencies:
"socket.io-client": "github:socketio/socket.io-client@^1.4.5"
before I had:
"socket.io-client": "npm:socket.io-client@^1.4.5"