diff --git a/packages/repack/android/build.gradle b/packages/repack/android/build.gradle
index e022d73dd..d41de4c20 100644
--- a/packages/repack/android/build.gradle
+++ b/packages/repack/android/build.gradle
@@ -31,7 +31,13 @@ def isNewArchitectureEnabled() {
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'kotlin-android'
+// AGP 9 ships built-in Kotlin support and registers the `kotlin` extension
+// itself. Applying the Kotlin plugin on top of it fails configuration with
+// "Cannot add extension with name 'kotlin'". Only apply it when nothing has
+// registered that extension yet.
+if (project.extensions.findByName('kotlin') == null) {
+    apply plugin: 'kotlin-android'
+}
 
 if (isNewArchitectureEnabled()) {
     apply plugin: "com.facebook.react"