diff --git a/.github/workflows/build_nupkg.yml b/.github/workflows/build_nupkg.yml
index 9bbd54d6..e443e765 100644
--- a/.github/workflows/build_nupkg.yml
+++ b/.github/workflows/build_nupkg.yml
@@ -12,6 +12,8 @@ jobs:
 
     steps:
     - uses: actions/checkout@v4
+      with:
+        submodules: recursive
     
     - name: Setup .NET
       uses: actions/setup-dotnet@v4