diff --git a/.github/workflows/deploy-image.yml b/.github/workflows/deploy-image.yml
index 6efb5d3..d9f8362 100644
--- a/.github/workflows/deploy-image.yml
+++ b/.github/workflows/deploy-image.yml
@@ -28,7 +28,7 @@ jobs:
 
       - name: create lowercase image
         id: lowercase
-        run: echo "LC_IMAGE_NAME=${IMAGE_NAME,,}"
+        run: echo "LC_IMAGE_NAME=${IMAGE_NAME,,}" >>${GITHUB_ENV}
 
       - name: Setup apptainer executable
         uses: eWaterCycle/setup-apptainer@v2