diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index effe607ce..b2c923005 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,6 +17,8 @@ jobs:
         os: [ubuntu-latest] #, macOS-latest]
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true
 
       - uses: haskell-actions/setup@v2
         with: