IONIC package build error but not locally

I’m using windows but it seems looking for some ubuntu directories

ANDROID_HOME=/opt/android-sdk
JAVA_HOME=/usr/lib/jvm/java-8-oracle
Error: Could not find gradle wrapper within Android SDK. Might need to update your Android SDK.
Looked here: /opt/android-sdk/tools/templates/gradle/wrapper

http://ionicframework.com/support#support
(Scroll down to “Business and Customer Support”)