exponent modules no longer referenced in npm

[arsanjea]

For the past few hours, I've been having problems yarning my project:
Darwin 16.4.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "--save-dev" "eslint-config-rallycoding"
npm ERR! node v6.9.4
npm ERR! npm v3.10.10

npm ERR! Invalid name: "@exponent/react-native-action-sheet"

same problem with react-native-fade-in-image