src/jdk.rmic/share/classes/sun/tools/java/ClassPath.java

*** 392,402 ****
          this.fs = fs;
          this.jrtModules = new LinkedHashSet<>();
          this.pkgDirs = new HashMap<>();
  
          // fill in module directories at the root dir
!         Path root = fs.getPath("/");
          try {
              try (DirectoryStream<Path> stream = Files.newDirectoryStream(root)) {
                  for (Path entry: stream) {
                      if (Files.isDirectory(entry))
                          jrtModules.add(entry);
--- 392,402 ----
          this.fs = fs;
          this.jrtModules = new LinkedHashSet<>();
          this.pkgDirs = new HashMap<>();
  
          // fill in module directories at the root dir
!         Path root = fs.getPath("/modules");
          try {
              try (DirectoryStream<Path> stream = Files.newDirectoryStream(root)) {
                  for (Path entry: stream) {
                      if (Files.isDirectory(entry))
                          jrtModules.add(entry);