--- old/make/CompileToolsJdk.gmk	2019-07-24 15:18:10.000000000 -0700
+++ new/make/CompileToolsJdk.gmk	2019-07-24 15:18:10.000000000 -0700
@@ -41,6 +41,7 @@
 BUILD_TOOLS_SRC_DIRS += \
     $(TOPDIR)/make/jdk/src/classes \
     $(BUILDTOOLS_OUTPUTDIR)/interim_cldrconverter_classes \
+    $(BUILDTOOLS_OUTPUTDIR)/interim_tzdb_classes \
     #
 
 $(eval $(call SetupJavaCompilation,BUILD_TOOLS_JDK, \