diff --git a/src/bin/tools/jar.ts b/src/bin/tools/jar.ts
index 962f994e..33fdf2df 100644
--- a/src/bin/tools/jar.ts
+++ b/src/bin/tools/jar.ts
@@ -48,8 +48,12 @@ export async function jarStream({ groupId, artifactId, version, asyncPathGenerat
     for await (const entry of asyncPathGeneratorFn()) {
         if ("buffer" in entry) {
             zipFile.addBuffer(entry.buffer, entry.zipPath);
-        } else if ("fsPath" in entry && !entry.fsPath.endsWith(sep)) {
-            zipFile.addFile(entry.fsPath, entry.zipPath);
+        } else if ("fsPath" in entry) {
+            if (entry.fsPath.endsWith(sep)) {
+                zipFile.addEmptyDirectory(entry.zipPath);
+            } else {
+                zipFile.addFile(entry.fsPath, entry.zipPath);
+            }
         }
     }