submodule.c: use GIT_DIR_ENVIRONMENT consistently

diff --git a/submodule.c b/submodule.c
index ece17315d671cf182f21c261d879c58f193cde09..fa32f450331a8ac7ab0bc7eb8008cf00427a1f73 100644 (file)
--- a/submodule.c
+++ b/submodule.c
@@ -1333,5 +1333,6 @@ void prepare_submodule_repo_env(struct argv_array *out)
                if (strcmp(*var, CONFIG_DATA_ENVIRONMENT))
                        argv_array_push(out, *var);
        }
-       argv_array_push(out, "GIT_DIR=.git");
+       argv_array_pushf(out, "%s=%s", GIT_DIR_ENVIRONMENT,
+                        DEFAULT_GIT_DIR_ENVIRONMENT);
 }