diff --git a/build_tools/build.sh b/build_tools/build.sh
index ac4cb00..6808982 100644
--- a/build_tools/build.sh
+++ b/build_tools/build.sh
@@ -7,7 +7,8 @@ APK_FILE=./build/app/outputs/flutter-apk/app-release.apk
 
 for i in {1..4}; do
 	dart run build_tools/replace_book.dart --book-name nce$i
-	flutter build apk --dart-define="BOOK_NAME=nce$i" --no-tree-shake-icons
 	mkdir -p ./dist
-	cp -f "$APK_FILE" "./dist/english_drill_nce$i_$VERSION.apk" && echo "$APK_FILE"
+	flutter build apk --dart-define="BOOK_NAME=nce$i" --no-tree-shake-icons --no-pub
+	cp -f "$APK_FILE" "./dist/english_drill(nce$i).$VERSION.apk" && echo "$APK_FILE"
+	sleep 20
 done