diff --git a/.github/workflows/ci.update-major-version-tag.yaml b/.github/workflows/ci.update-major-version-tag.yaml
index 7f14ebd..b3ac9c5 100644
--- a/.github/workflows/ci.update-major-version-tag.yaml
+++ b/.github/workflows/ci.update-major-version-tag.yaml
@@ -27,8 +27,9 @@ jobs:
           fetch-depth: 0
       - name: Extract major version
         id: version
+        env:
+          TAG_NAME: ${{ github.event.inputs.tag || github.event.release.tag_name || github.ref_name }}
         run: |
-          TAG_NAME="${{ github.event.inputs.tag || github.event.release.tag_name || github.ref_name }}"
           echo "Resolved tag: $TAG_NAME"
           if [[ ! "$TAG_NAME" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
             echo "::notice::'$TAG_NAME' is not a release semver tag (vX.Y.Z); skipping major-tag update."