Cannot build Android - repository missing


I’m trying to build Android for Shield Portable according to instructions (;a=blob_plain;f=README;hb=rel-roth-partner). The command repo sync fails because a repository in manifest cannot be found.

Here visualized with direct git clone:

$ git clone git://
Cloning into 'widevine'...
fatal: remote error: access denied or repository not exported: /android/platform/vendor/widevine

Same issue here. widevine git repo cannot be downloaded via either repo sync or git clone.