diff --git a/bin/compose-core b/bin/compose-core
index bf2c4b3..7558b22 100755
--- a/bin/compose-core
+++ b/bin/compose-core
@@ -2491,6 +2491,7 @@ get_all_relations () {
 
     if [ -e "${cache_file}" ]; then
         #debug "$FUNCNAME: SESSION cache hit $1"
+        export ALL_RELATIONS="$cache_file"
         cat "${cache_file}"
         return 0
     fi