diff --git a/.github/workflows/pack.yaml b/.github/workflows/pack.yaml
index 047ac8c..0941adb 100644
--- a/.github/workflows/pack.yaml
+++ b/.github/workflows/pack.yaml
@@ -17,6 +17,7 @@ jobs:
         uses: actions/checkout@v4.1.7
         with:
           fetch-depth: 0
+          ref: main
 
       - name: Set default branch.
         run: |