diff --git a/core/binary.mk b/core/binary.mk
index 85d084f..4554d4d 100644
--- a/core/binary.mk
+++ b/core/binary.mk
@@ -71,7 +71,7 @@
   endif
 
   # Make sure we've built the NDK.
-  my_additional_dependencies += ndk
+  my_additional_dependencies += $(SOONG_OUT_DIR)/ndk.timestamp
 
   # mips32r6 is not supported by the NDK. No released NDK contains these
   # libraries, but the r10 in prebuilts/ndk had a local hack to add them :(