Why play services AAR fails in Unity3D 5.1.2

“Moving Temp/StagingArea/android-libraries/play-services-7.5.0/classes.jar to Temp/StagingArea/android-libraries/play-services-7.5.0/bin/classes.jar: No such file or directory”

Specified AAR indeed contains no classes.jar, so why Unity3D expects it to be there?

Sounds like a bug. Can you please submit a bug report? We’ll fix that.