diff --git a/.github/workflows/on-demand-build-images.yaml b/.github/workflows/on-demand-build-images.yaml
index 88c0674d..80131ee8 100644
--- a/.github/workflows/on-demand-build-images.yaml
+++ b/.github/workflows/on-demand-build-images.yaml
@@ -21,7 +21,7 @@ jobs:
         env:
             AWS_REGION: us-east-1
       - name: Set Final Tag
-        run: echo "TAG=on-demand-${{ inputs.tag_name }}" >> .env
+        run: echo "TAG=on-demand-${{ inputs.tag_name }}" >> "$GITHUB_ENV"
 
       - name: Build Docker Image
         run: |