diff --git a/android/app/build.gradle b/android/app/build.gradle
index 54ef0a7f..720f2d21 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -97,6 +97,12 @@ tasks.register("fetchRepositoryBundledWheels", Exec) {
     commandLine(pyExe, "scripts/build/fetch_repository_wheels.py")
     ignoreExitValue = false
     onlyIf {
+        if (System.getenv("MESHCHATX_OFFLINE_BUILD") == "1") {
+            if (!repositoryBundledWheelsDir.isDirectory() || !repositoryBundledWheelsDir.list()?.any { it.endsWith(".whl") }) {
+                throw new org.gradle.api.GradleException("MESHCHATX_OFFLINE_BUILD=1 but repository bundled wheels are missing at ${repositoryBundledWheelsDir}")
+            }
+            return false
+        }
         if (System.getenv("MESHCHATX_SKIP_REPOSITORY_WHEELS_FETCH") == "1") {
             return false
         }
diff --git a/scripts/build-android-wheels-local.sh b/scripts/build-android-wheels-local.sh
index 22224715..781c0729 100755
--- a/scripts/build-android-wheels-local.sh
+++ b/scripts/build-android-wheels-local.sh
@@ -39,6 +39,11 @@ EOF
 
 ROOT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 
+if [ "${MESHCHATX_OFFLINE_BUILD:-}" = "1" ]; then
+    echo "MESHCHATX_OFFLINE_BUILD=1: Android wheel build requires network access. Pre-build wheels offline or unset MESHCHATX_OFFLINE_BUILD." >&2
+    exit 1
+fi
+
 PYTHON_MINOR="3.11"
 TARGET_VERSION=""
 CHAQUOPY_REF="${CHAQUOPY_REF:-master}"