diff --git a/.github/workflows/build-images.yaml b/.github/workflows/build-images.yaml
index 930c18b8..31ae3a89 100644
--- a/.github/workflows/build-images.yaml
+++ b/.github/workflows/build-images.yaml
@@ -34,6 +34,7 @@ jobs:
         id: authorino-build-info
         run: |
           if [[ ${GITHUB_REF_NAME/\//-} =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-.+)?$ ]]; then
+            tag=${GITHUB_REF_NAME/\//-}
             echo "VERSION=${tag#v}" >> $GITHUB_ENV
           else
             echo "version=latest" >> $GITHUB_ENV