Several packages just disapperead, now some are re-appearing, potentially uploaded by differnt users (!). See https://github.com/npm/registry/issues/255 https:

Several packages just disapperead, now some are re-appearing, potentially uploaded by differnt users (!). See https://github.com/npm/registry/issues/255 https://github.com/npm/registry/issues/255 for details. Very annoying, breaks builds all over, also prevents installing react-native.