-CCSYSROOT = $(NDK)/sysroot
-ISYS = $(CCSYSROOT)/usr/include/aarch64-linux-android
-LDSYSROOT = $(NDK)/platforms/android-23/arch-arm64
+CCSYSROOT = --sysroot=$(NDK)/sysroot
+ISYS = --isystem=$(CCSYSROOT)/usr/include/aarch64-linux-android
+LDSYSROOT = --sysroot=$(NDK)/platforms/android-23/arch-arm64