From 8259ba8a61aedf3e3b6eb067559c20c4d092c4f5 Mon Sep 17 00:00:00 2001 From: Gabriel Donadel Dall'Agnol Date: Fri, 4 Sep 2026 08:35:14 -0700 Subject: [PATCH] fix(android): skip explicit Kotlin plugin when AGP registers the kotlin extension AGP 9 ships built-in Kotlin support and registers the kotlin extension itself. Applying the Kotlin plugin again fails configuration with "Cannot add extension with name 'kotlin'". Check for the extension directly, which needs no AGP version table and covers AGP 10, where the android.builtInKotlin opt-out is removed. --- packages/react-native/android/build.gradle | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/packages/react-native/android/build.gradle b/packages/react-native/android/build.gradle index fd869fa4d..a35e92084 100644 --- a/packages/react-native/android/build.gradle +++ b/packages/react-native/android/build.gradle @@ -15,7 +15,14 @@ buildscript { } 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" +} + apply plugin: "com.facebook.react" def getExtOrDefault(name) {