I wrote an eselect module [1] (and ebuild [2]) to choose between different Android Build tools downloadable with dev-util/android-sdk-update-manager package. [1] https://github.com/fedeliallalinea/eselect-android-build-tools [2] https://github.com/fedeliallalinea/gallifrey/tree/master/app-eselect/eselect-android-build-tools Reproducible: Always