Building an Android module with the latest Google Play SDK

I'm working on a previously mentioned Android geofencing module and I'm having trouble importing the geofence package. It's part of the Google Play SDK, and I've set my SDK in build.properties to:

android.platform=/Users/ap/android-sdk/sdk/platforms/android-19
google.apis=/Users/ap/android-sdk/sdk/add-ons/addon-google_apis-google-19

In my code, I try importing:

import com.google.android.gms.location.Geofence;

...but when I build, I get the following error:

[javac] ...package com.google.android.gms.location does not exist
[javac] import com.google.android.gms.location.Geofence;

I'm pretty sure the problem is that the Google Play SDK is the issue here (or rather, a lack thereof), but I can't figure out where I need to point to it when I'm not.