diff --git a/.github/workflows/build_images.yml b/.github/workflows/build_images.yml
index 881d1c76d..de18213d5 100644
--- a/.github/workflows/build_images.yml
+++ b/.github/workflows/build_images.yml
@@ -106,7 +106,7 @@ jobs:
         run: |
             platform_list=$(jq -r '.os.${{ matrix.os }} | join(",")' "./build.xml")
 
-            echo ::set-output name=list::${DOCKER_PLATFORM}
+            echo ::set-output name=list::$platform_list
 
       - name: Prepare environment (${{ github.event_name }})
         if: github.event_name == 'push'