--- old/make/autoconf/spec.gmk.in	2017-12-04 21:40:11.380750703 +0100
+++ new/make/autoconf/spec.gmk.in	2017-12-04 21:40:11.104750699 +0100
@@ -78,7 +78,6 @@
 OPENJDK_TARGET_CPU_LEGACY:=@OPENJDK_TARGET_CPU_LEGACY@
 OPENJDK_TARGET_CPU_LEGACY_LIB:=@OPENJDK_TARGET_CPU_LEGACY_LIB@
 OPENJDK_TARGET_CPU_OSARCH:=@OPENJDK_TARGET_CPU_OSARCH@
-OPENJDK_TARGET_OS_EXPORT_DIR:=@OPENJDK_TARGET_OS_EXPORT_DIR@
 
 HOTSPOT_TARGET_OS := @HOTSPOT_TARGET_OS@
 HOTSPOT_TARGET_OS_TYPE := @HOTSPOT_TARGET_OS_TYPE@