Gradle sync fails in Android Studio 2.0 preview beta 2. My project used to work perfectly in older previews, but since preview 9 gradle sync fails with error:
failed to find target with hash string 'android-23'
The issue seems to be with gradle plugin. alpha9 is buggy.
avoid 2.0.0-alpha9 use 2.0.0-beta2
in your project gradle file.
Works with preview 9 and beta 2 versions of android studio.