diff --git a/appinventor/buildserver/src/com/google/appinventor/buildserver/tasks/android/AttachAarLibs.java b/appinventor/buildserver/src/com/google/appinventor/buildserver/tasks/android/AttachAarLibs.java
index 1a325769f98..9ea6e66a7fc 100644
--- a/appinventor/buildserver/src/com/google/appinventor/buildserver/tasks/android/AttachAarLibs.java
+++ b/appinventor/buildserver/src/com/google/appinventor/buildserver/tasks/android/AttachAarLibs.java
@@ -44,16 +44,27 @@ public TaskResult execute(AndroidCompilerContext context) {
 
     // walk components list for libraries ending in ".aar"
     try {
-      for (Set<String> libs : context.getComponentInfo().getLibsNeeded().values()) {
-        Iterator<String> i = libs.iterator();
+      for (String type : context.getComponentInfo().getLibsNeeded().keySet()) {
+        Iterator<String> i = context.getComponentInfo().getLibsNeeded().get(type).iterator();
         while (i.hasNext()) {
           String libname = i.next();
+          String sourcePath = "";
           if (libname.endsWith(".aar")) {
             i.remove();
             if (!processedLibs.contains(libname)) {
+              if (context.getSimpleCompTypes().contains(type) || "ANDROID".equals(type)) {
+                final String pathSuffix = context.getResources().getRuntimeFilesDir() + libname;
+                sourcePath = context.getResource(pathSuffix);
+              } else if (context.getExtCompTypes().contains(type)) {
+                final String pathSuffix = "/aars/" + libname;
+                sourcePath = ExecutorUtils.getExtCompDirPath(type, context.getProject(),
+                    context.getExtTypePathCache()) + pathSuffix;
+              } else {
+                context.getReporter().error("Unknown component type: " + type, true);
+                return TaskResult.generateError("Error while attaching AAR libraries");
+              }
               // explode libraries into ${buildDir}/exploded-aars/<package>/
-              AARLibrary aarLib = new AARLibrary(new File(context.getResource(
-                  context.getResources().getRuntimeFilesDir() + libname)));
+              AARLibrary aarLib = new AARLibrary(new File(sourcePath));
               aarLib.unpackToDirectory(explodedBaseDir);
               context.getComponentInfo().getExplodedAarLibs().add(aarLib);
               processedLibs.add(libname);
diff --git a/appinventor/components/src/com/google/appinventor/components/scripts/ExternalComponentGenerator.java b/appinventor/components/src/com/google/appinventor/components/scripts/ExternalComponentGenerator.java
index 1d8d7e72ca4..438421b19a5 100644
--- a/appinventor/components/src/com/google/appinventor/components/scripts/ExternalComponentGenerator.java
+++ b/appinventor/components/src/com/google/appinventor/components/scripts/ExternalComponentGenerator.java
@@ -169,14 +169,19 @@ private static void generateExternalComponentBuildFiles(String packageName, List
       JSONObject componentBuildInfo = info.buildInfo;
       try {
         JSONArray librariesNeeded = componentBuildInfo.getJSONArray("libraries");
+        JSONArray librariesAar = new JSONArray();
         for (int j = 0; j < librariesNeeded.length(); ++j) {
           // Copy Library files for Unjar and Jaring
           String library = librariesNeeded.getString(j);
           copyFile(buildServerClassDirPath + File.separator + library,
               extensionTempDirPath + File.separator + library);
+          if (library.endsWith(".aar")) {
+            copyExternalAar(library, packageName);
+            librariesAar.put(library);
+          }
         }
         //empty the libraries meta-data to avoid redundancy
-        componentBuildInfo.put("libraries", new JSONArray());
+        componentBuildInfo.put("libraries", librariesAar);
       } catch(JSONException e) {
         // bad
         throw new IllegalStateException("Unexpected JSON exception parsing simple_components.json",
@@ -344,6 +349,22 @@ private static Boolean copyFile(String srcPath, String dstPath) {
     return true;
   }
 
+  private static void copyExternalAar(String library, String packageName)
+      throws IOException {
+    File sourceDir = new File(buildServerClassDirPath + File.separator);
+    File aarFile = new File(sourceDir, library);
+    if (!aarFile.exists() || !library.endsWith(".aar")) {
+      return;
+    }
+    // Get aar dest directory
+    File destDir = new File(externalComponentsDirPath + File.separator + packageName + File.separator);
+    File aarDestDir = new File(destDir, "aars");
+    ensureFreshDirectory(aarDestDir.getPath(), "Unable to delete the aars directory for the extension.");
+
+    System.out.println("Extensions : " + "Copying file aar " + library);
+    copyFile(aarFile.getAbsolutePath(), aarDestDir.getAbsolutePath() + File.separator + library);
+  }
+
   /**
    * Copy a compiled classes related to a given extension in his package folder.
    *