How to change the android buildtools version in Appcelerator

You can change the build tools version using this command

appc ti config android.buildTools.selectedVersion ##.##.##

Example
appc ti config android.buildTools.selectedVersion 25.0.3

Just go to your Android SDK location. Here you will see the version number.

For mac location

/users/fokkezb/Library/Android/sdk/build-tools/ version_number

Hope this helps.