diff --git a/.github/workflows/nightly.yml b/.github/workflows/nightly.yml
index 6dea1e4e9..78f4ec475 100644
--- a/.github/workflows/nightly.yml
+++ b/.github/workflows/nightly.yml
@@ -33,8 +33,8 @@ jobs:
             VERSION="${BASE_VERSION}-nightly-${DATE}-${SHA}"
           fi
           TAG="nightly-${DATE}-${SHA}"
-          echo "version=${VERSION}" >> $GITHUB_OUTPUT
-          echo "tag=${TAG}" >> $GITHUB_OUTPUT
+          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
+          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"
 
   build:
     name: Build