Plugin Collision

[BananaHemic]

Hey all,

I'm trying to compile this repo for Android, primarily because I'd like to get voice communication with Opus working. Unfortunately, when building this I get an error saying:

Found plugins with same names and architectures, Assets/Plugins/x86_64/opus.dll () and Assets/Plugins/x86/opus.dll (). Assign different architectures or delete the duplicate.

In Unity, I've set each of those two dlls to the correct CPU, but this seems to be happening anyway.
Does anyone have any ideas how I might be able to get this compile on Android? This is on Unity 5.4.1p1 with NDK-r10e. This error happens with either Mono or IL2CPP scripting backend. This is without Unity Remote installed.

Does anyone have any ideas why this might be happening?