diff -r 71c04702a3d5 -r 72e3ae9a25eb make/gensrc/GensrcBuffer.gmk
--- a/make/gensrc/GensrcBuffer.gmk	Tue Sep 12 19:03:39 2017 +0200
+++ b/make/gensrc/GensrcBuffer.gmk	Tue Sep 12 19:03:56 2017 +0200
@@ -27,7 +27,7 @@
 
 GENSRC_BUFFER_DST := $(SUPPORT_OUTPUTDIR)/gensrc/java.base/java/nio
 
-GENSRC_BUFFER_SRC := $(JDK_TOPDIR)/src/java.base/share/classes/java/nio
+GENSRC_BUFFER_SRC := $(TOPDIR)/src/java.base/share/classes/java/nio
 
 ###