diff --git a/.github/workflows/buildCSharp.yml b/.github/workflows/buildCSharp.yml
index 4339fcbac6..ae3f2b4af7 100644
--- a/.github/workflows/buildCSharp.yml
+++ b/.github/workflows/buildCSharp.yml
@@ -36,8 +36,14 @@ jobs:
     steps:
     - uses: actions/checkout@v4
       # If you need to rebuild for a specific branch **after** you fixed the workflow...
-      # with:
-      #   ref: develop
+      with:
+        ref: v3.8.0
+
+    - name: download patched CMakeLists.txt
+      shell: bash
+      run: |
+        rm CMakeLists.txt
+        aria2c https://raw.githubusercontent.com/NREL/OpenStudio/CSharp/CMakeLists.txt
 
     - uses: actions/setup-python@v5