diff --git a/.github/workflows/images_build.yml b/.github/workflows/images_build.yml
index e58d9f84a..f52a8fee8 100644
--- a/.github/workflows/images_build.yml
+++ b/.github/workflows/images_build.yml
@@ -337,8 +337,8 @@ jobs:
             echo "${cache_to[*]}"
             echo "::endgroup::"
 
-            cache_from=$(printf '%s\n' "${cache_from[@]}")
-            cache_to=$(printf '%s\n' "${cache_to[@]}")
+            cache_from=$(printf '%s\n' "${cache_from[@]}" | jq -R . | jq -s --compact-output .)
+            cache_to=$(printf '%s\n' "${cache_to[@]}" | jq -R . | jq -s --compact-output .)
 
             echo "cache_from=\"$cache_from\"" >> $GITHUB_OUTPUT
             echo "cache_to=\"$cache_to\"" >> $GITHUB_OUTPUT