diff --git a/core/aux_config.mk b/core/aux_config.mk
index a508a2dd15..86dc10a540 100644
--- a/core/aux_config.mk
+++ b/core/aux_config.mk
@@ -149,6 +149,8 @@ AUX_ALL_SUBARCHS :=
 variant_sfx :=_aux_variant_config.mk
 os_sfx :=_aux_os_config.mk
 
+ifdef AUX_OS_VARIANT_LIST
+
 config_roots := $(wildcard device vendor)
 all_configs :=
 ifdef config_roots
@@ -180,4 +182,6 @@ $(foreach v,$(AUX_ALL_VARIANTS),\
 )
 endif
 
+endif # AUX_OS_VARIANT_LIST
+
 INSTALLED_AUX_TARGETS :=