'-prefix' path ignored on Android configure with qttools component

> export ANDROID_API_VERSION=19_r04
> ./configure \
    -confirm-license \
    -nomake examples \
    -nomake tests \
    -opensource \
    -xplatform android-g++ \
    -android-sdk "${MYSDK}" \
    -android-ndk "${MYNDK}" \
    -android-ndk-platform android-19 \
    -android-arch armeabi-v7a \
    -no-warnings-are-errors \
    -android-ndk-host darwin-x86_64 \
    -verbose \
    -static \
    -prefix "${QT_INSTALL_DIR}" \
    -debug-and-release \
    -skip qt3d \
    -skip qtactiveqt \
    -skip qtandroidextras \
    -skip qtcanvas3d \
    -skip qtconnectivity \
    -skip qtdeclarative \
    -skip qtdoc \
    -skip qtenginio \
    -skip qtgraphicaleffects \
    -skip qtimageformats \
    -skip qtlocation \
    -skip qtmacextras \
    -skip qtmultimedia \
    -skip qtquick1 \
    -skip qtquickcontrols \
    -skip qtscript \
    -skip qtsensors \
    -skip qtserialport \
    -skip qtsvg \
    -skip qttranslations \
    -skip qtwayland \
    -skip qtwebchannel \
    -skip qtwebengine \
    -skip qtwebkit \
    -skip qtwebkit-examples \
    -skip qtwebsockets \
    -skip qtwinextras \
    -skip qtx11extras \
    -skip qtxmlpatterns
> make install
...
mkdir: /libs/armeabi-v7a/: Permission denied

> grep 'mkdir.*INSTALL_ROOT' qttools/src/qtplugininfo/Makefile 
	@test -d $(INSTALL_ROOT)/libs/armeabi-v7a/ || mkdir -p $(INSTALL_ROOT)/libs/armeabi-v7a/