diff -r 6c4bdbf90897 -r 7c08e9f96916 make/autoconf/spec.gmk.in
--- a/make/autoconf/spec.gmk.in	Tue Dec 05 22:26:17 2017 +0100
+++ b/make/autoconf/spec.gmk.in	Tue Dec 05 23:11:27 2017 +0100
@@ -577,7 +577,7 @@
 INTERIM_LANGTOOLS_ARGS := \
     --limit-modules java.base,jdk.zipfs,$(INTERIM_LANGTOOLS_MODULES_COMMA) \
     --add-modules $(INTERIM_LANGTOOLS_MODULES_COMMA) \
-    --module-path $(BUILDTOOLS_OUTPUTDIR)/interim_modules \
+    --module-path $(BUILDTOOLS_OUTPUTDIR)/interim_langtools_modules \
     $(INTERIM_LANGTOOLS_ADD_EXPORTS) \
     #
 JAVAC_MAIN_CLASS = -m jdk.compiler.interim/com.sun.tools.javac.Main
@@ -588,8 +588,10 @@
 INTERIM_RMIC_ADD_EXPORTS := \
     --add-exports java.corba/com.sun.corba.se.impl.util=jdk.rmic.interim \
     #
-INTERIM_RMIC_ARGS := --limit-modules java.base,jdk.compiler,jdk.javadoc,java.corba \
-    --module-path $(BUILDTOOLS_OUTPUTDIR)/interim_modules \
+# Use = to delay expansion of PathList since it's not available in this file.
+INTERIM_RMIC_ARGS = --limit-modules java.base,jdk.compiler,jdk.javadoc,java.corba \
+    --module-path $(call PathList, $(BUILDTOOLS_OUTPUTDIR)/interim_rmic_modules \
+        $(BUILDTOOLS_OUTPUTDIR)/interim_langtools_modules) \
     $(INTERIM_RMIC_ADD_EXPORTS) \
     #