diff --git a/core/prebuilt_internal.mk b/core/prebuilt_internal.mk
index d450373..b6727fa 100644
--- a/core/prebuilt_internal.mk
+++ b/core/prebuilt_internal.mk
@@ -85,8 +85,10 @@
 
 ifeq ($(LOCAL_MODULE_CLASS),APPS)
 LOCAL_BUILT_MODULE_STEM := package.apk
+ifndef LOCAL_INSTALLED_MODULE_STEM
 LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_MODULE).apk
 endif
+endif
 
 ifneq ($(filter true no_debuglink,$(my_strip_module) $(my_pack_module_relocations)),)
   ifdef LOCAL_IS_HOST_MODULE