ionic build produces wrong apk filename

using ionic (v 1.0.0.-beta.13), cordova 4.0.0. When I build for android, the name of the apk produced is "CordovaApp.apk", rather than ".apk", which it was "previously" (before some updates to ionic, cordova, and a delete/add of the android platform in my project). The project name in my config.xml (in the project top level directory) is correct.

I can see the build.xml in my android platform directory specifies this, but this file is overwritten by the "ionic build" each time, so changing it there doesnt fix anything...