--- a/make/JrtfsJar.gmk	Tue Sep 12 19:03:39 2017 +0200
+++ b/make/JrtfsJar.gmk	Tue Sep 12 19:03:56 2017 +0200
@@ -33,7 +33,7 @@
 
 # This rule will be depended on due to the MANIFEST line
 $(eval $(call SetupTextFileProcessing, BUILD_JAVA_MANIFEST, \
-  SOURCE_FILES := $(JDK_TOPDIR)/make/data/mainmanifest/manifest.mf, \
+  SOURCE_FILES := $(TOPDIR)/make/data/mainmanifest/manifest.mf, \
   OUTPUT_FILE := $(SUPPORT_OUTPUTDIR)/java-main-manifest.mf, \
   REPLACEMENTS := \
       @@VERSION_SPECIFICATION@@ => $(VERSION_SPECIFICATION) ; \
@@ -48,7 +48,7 @@
 
 $(eval $(call SetupJavaCompilation, BUILD_JRTFS, \
     SETUP := GENERATE_OLDBYTECODE, \
-    SRC := $(JDK_TOPDIR)/src/java.base/share/classes, \
+    SRC := $(TOPDIR)/src/java.base/share/classes, \
     EXCLUDE_FILES := module-info.java, \
     INCLUDES := $(JIMAGE_PKGS), \
     BIN := $(SUPPORT_OUTPUTDIR)/jrtfs_classes))
@@ -58,7 +58,7 @@
 # Adding META-INF/services would include all files in that directory when only the one
 # is needed, which is why this explicit copy is defined instead.
 $(eval $(call SetupCopyFiles, COPY_JIMAGE_SERVICE_PROVIDER, \
-    SRC := $(JDK_TOPDIR)/src/java.base/share/classes, \
+    SRC := $(TOPDIR)/src/java.base/share/classes, \
     DEST := $(SUPPORT_OUTPUTDIR)/jrtfs_classes, \
     FILES := META-INF/services/java.nio.file.spi.FileSystemProvider))