diff --git a/git/checkout/action.yaml b/git/checkout/action.yaml
index cf9884c..5db000e 100644
--- a/git/checkout/action.yaml
+++ b/git/checkout/action.yaml
@@ -11,6 +11,6 @@ runs:
         image: alpine/git:latest
         options: -v ${{ github.workspace }}:/root
         run: |
-          HOST=$(echo "$GITHUB_SERVER_URL" | sed 's%https://%%')
+          HOST=$(echo "${{ github.server_url }}" | sed 's%https://%%')
           URL="https://$GITHUB_TOKEN@$HOST/$GITHUB_REPOSITORY.git"
           git clone -b "$GITHUB_REF_NAME" "$URL" .