How can I add Project Fi support to my ROM?

[BLuFeNiX]

I've compiled 7.0_r1 for the Nexus 6, and I'd like to get project fi working (with wifi calling, if possible). I tried adding opengapps and the Google Dialer suggested in the Pure Nexus thread, but it seems I'm missing some packages because I can't get the phone to register with Fi.

Can someone point me to the right documentation, packages, git commits, makefile, etc.? I'm familiar with the build system and AOSP internals, just not sure what specific pieces I need.

Thanks.

 

[b8842dc0]

Out of curiosity, do you get error messages during the registration process? What happens, specifically?