diff --git a/.github/workflows/build_test.yaml b/.github/workflows/build_test.yaml
index e707e65..ce20eaa 100644
--- a/.github/workflows/build_test.yaml
+++ b/.github/workflows/build_test.yaml
@@ -29,11 +29,13 @@ jobs:
 
       - name: Check code style
         run: |
+          python3 -m pycodestyle ./*.py
           python3 -m pycodestyle ./lglpy
           python3 -m pycodestyle ./generator
 
       - name: Check typing
         run: |
+          python3 -m mypy ./*.py
           python3 -m mypy ./lglpy
           python3 -m mypy ./generator
 
diff --git a/lgl_android_install.py b/lgl_android_install.py
index 0678bbb..588e36e 100755
--- a/lgl_android_install.py
+++ b/lgl_android_install.py
@@ -275,7 +275,7 @@ def get_package_name(
 
 def get_layer_metadata(
         layer_dirs: list[str],
-        need_32bit: bool, need_symbols: bool) -> Optional[str]:
+        need_32bit: bool, need_symbols: bool) -> list[LayerMeta]:
     '''
     Get the layer metadata for all of the selected layers.