diff --git a/android/java/app/build.gradle b/android/java/app/build.gradle
index e44bbdbd5..4a36c7d1e 100644
--- a/android/java/app/build.gradle
+++ b/android/java/app/build.gradle
@@ -4,11 +4,13 @@ task accessToken {
     def rawDir = new File("app/src/main/res/raw")
     rawDir.mkdirs()
     def tokenFile = new File("app/src/main/res/raw/token.txt")
-    String token = System.getenv('MAPBOX_ACCESS_TOKEN')
-    if (token == null) {
-        throw new InvalidUserDataException("You must set the MAPBOX_ACCESS_TOKEN environment variable.")
+    if (!tokenFile.exists()) {
+        String token = System.getenv('MAPBOX_ACCESS_TOKEN')
+        if (token == null) {
+            throw new InvalidUserDataException("You must set the MAPBOX_ACCESS_TOKEN environment variable.")
+        }
+        tokenFile.write(token)
     }
-    tokenFile.write(token)
 }
 
 gradle.projectsEvaluated {