diff --git a/emoji-compat/build.gradle b/emoji-compat/build.gradle
index 0da67c7..f21cd6f 100644
--- a/emoji-compat/build.gradle
+++ b/emoji-compat/build.gradle
@@ -24,8 +24,12 @@
 }
 
 buildscript {
+    boolean unbundleBuild = (new File("unbundled-build")).exists()
     repositories {
         maven { url '../../../prebuilts/tools/common/m2/repository' }
+        if (unbundleBuild) {
+            jcenter()
+        }
     }
 
     dependencies {