Manual.diff

diff --git a/bin/flutter b/bin/flutter
index ee4131c00..db7f30a69 100755
--- a/bin/flutter
+++ b/bin/flutter
@@ -76,7 +76,7 @@ FLUTTER_TOOL_ARGS="--assert-initializer $FLUTTER_TOOL_ARGS"
     # some platforms (e.g. Mac) don't have flock or any reliable alternative
   fi
   REVISION=`(cd "$FLUTTER_ROOT"; git rev-parse HEAD)`
-  if [ ! -f "$SNAPSHOT_PATH" ] || [ ! -s "$STAMP_PATH" ] || [ `cat "$STAMP_PATH"` != "$REVISION" ] || [ "$FLUTTER_TOOLS_DIR/pubspec.yaml" -nt "$FLUTTER_TOOLS_DIR/pubspec.lock" ]; then
+  # if [ ! -f "$SNAPSHOT_PATH" ] || [ ! -s "$STAMP_PATH" ] || [ `cat "$STAMP_PATH"` != "$REVISION" ] || [ "$FLUTTER_TOOLS_DIR/pubspec.yaml" -nt "$FLUTTER_TOOLS_DIR/pubspec.lock" ]; then
     mkdir -p "$FLUTTER_ROOT/bin/cache"
     touch "$FLUTTER_ROOT/bin/cache/.dartignore"
     "$FLUTTER_ROOT/bin/internal/update_dart_sdk.sh"
@@ -95,7 +95,7 @@ FLUTTER_TOOL_ARGS="--assert-initializer $FLUTTER_TOOL_ARGS"
     done
     "$DART" --snapshot="$SNAPSHOT_PATH" --packages="$FLUTTER_TOOLS_DIR/.packages" "$SCRIPT_PATH"
     echo $REVISION > "$STAMP_PATH"
-  fi
+  # fi
 ) 3< "$PROG_NAME"
 
 set +e
diff --git a/packages/flutter_tools/lib/src/commands/build_aot.dart b/packages/flutter_tools/lib/src/commands/build_aot.dart
index 01f1ef627..cd1bff2e8 100644
--- a/packages/flutter_tools/lib/src/commands/build_aot.dart
+++ b/packages/flutter_tools/lib/src/commands/build_aot.dart
@@ -324,7 +324,7 @@ Future<String> _buildAotSnapshot(
   if (platform == TargetPlatform.ios) {
     printStatus('Building App.framework...');
 
-    final List<String> commonBuildOptions = <String>['-arch', 'arm64', '-miphoneos-version-min=8.0'];
+    final List<String> commonBuildOptions = <String>['-arch', 'armv7s', '-miphoneos-version-min=8.0'];
 
     if (interpreter) {
       await runCheckedAsync(<String>['mv', vmSnapshotData, fs.path.join(outputDir.path, kVmSnapshotData)]);

I think armv7s should be armv7. Otherwise it will only run on iphone 5, not on iphone4s.