--- jdk-10/src/jdk.jlink/share/classes/jdk/tools/jmod/JmodTask.java.orig	2022-04-04 11:18:52.760626467 +0200
+++ jdk-10/src/jdk.jlink/share/classes/jdk/tools/jmod/JmodTask.java	2022-04-04 12:03:40.645325687 +0200
@@ -105,6 +105,7 @@
 import jdk.internal.module.ModuleTarget;
 import jdk.internal.module.Resources;
 import jdk.tools.jlink.internal.Utils;
+import java.util.TreeSet;
 
 import static java.util.stream.Collectors.joining;
 
@@ -768,6 +769,7 @@
         void processSection(JmodOutputStream out, Section section, Path path)
             throws IOException
         {
+            TreeSet<Path> paths = new TreeSet<>();
             Files.walkFileTree(path, Set.of(FileVisitOption.FOLLOW_LINKS),
                 Integer.MAX_VALUE, new SimpleFileVisitor<Path>() {
                     @Override
@@ -781,20 +783,24 @@
 
                         if (!relPath.toString().equals(MODULE_INFO)
                                 && !matches(relPath, excludes)) {
-                            try (InputStream in = Files.newInputStream(file)) {
-                                out.writeEntry(in, section, relPath.toString());
-                            } catch (IOException x) {
-                                if (x.getMessage().contains("duplicate entry")) {
-                                    warning("warn.ignore.duplicate.entry",
-                                            relPath.toString(), section);
-                                    return FileVisitResult.CONTINUE;
-                                }
-                                throw x;
-                            }
+                            paths.add(file);
                         }
                         return FileVisitResult.CONTINUE;
                     }
                 });
+            for (Path file : paths) {
+                Path relPath = path.relativize(file);
+                try (InputStream in = Files.newInputStream(file)) {
+                    out.writeEntry(in, section, relPath.toString());
+                } catch (IOException x) {
+                    if (x.getMessage().contains("duplicate entry")) {
+                        warning("warn.ignore.duplicate.entry",
+                                  relPath.toString(), section);
+                        continue;
+                    }
+                    throw x;
+                }
+            }
         }
 
         boolean matches(Path path, List<PathMatcher> matchers) {