diff --git a/core/config.mk b/core/config.mk
index ae65944..0c8a87f 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -1246,6 +1246,12 @@
 # in the source tree.
 dont_bother_goals := out product-graph
 
+ifeq ($(TARGET_SYSTEM_PROP),)
+TARGET_SYSTEM_PROP := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
+endif
+
+.KATI_READONLY += TARGET_SYSTEM_PROP
+
 include $(BUILD_SYSTEM)/sysprop_config.mk
 
 # Make ANDROID Soong config variables visible to Android.mk files, for
diff --git a/core/soong_config.mk b/core/soong_config.mk
index 72ee2e4..ab29a61 100644
--- a/core/soong_config.mk
+++ b/core/soong_config.mk
@@ -340,6 +340,8 @@
 
 $(call add_json_list, OemProperties, $(PRODUCT_OEM_PROPERTIES))
 
+$(call add_json_list, SystemPropFiles, $(TARGET_SYSTEM_PROP))
+
 # Do not set ArtTargetIncludeDebugBuild into any value if PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD is not set,
 # to have the same behavior from runtime_libart.mk.
 ifneq ($(PRODUCT_ART_TARGET_INCLUDE_DEBUG_BUILD),)
diff --git a/core/soong_extra_config.mk b/core/soong_extra_config.mk
index e4432d2..2df721f 100644
--- a/core/soong_extra_config.mk
+++ b/core/soong_extra_config.mk
@@ -93,6 +93,8 @@
 
 $(call add_json_list, BuildVersionTags, $(BUILD_VERSION_TAGS))
 
+$(call add_json_bool, ProductNotDebuggableInUserdebug, $(PRODUCT_NOT_DEBUGGABLE_IN_USERDEBUG))
+
 $(call json_end)
 
 $(shell mkdir -p $(dir $(SOONG_EXTRA_VARIABLES)))
diff --git a/core/sysprop.mk b/core/sysprop.mk
index 47d8a41..615025d 100644
--- a/core/sysprop.mk
+++ b/core/sysprop.mk
@@ -231,11 +231,7 @@
 
 buildinfo_prop := $(call intermediates-dir-for,ETC,buildinfo.prop)/buildinfo.prop
 
-ifdef TARGET_SYSTEM_PROP
 system_prop_file := $(TARGET_SYSTEM_PROP)
-else
-system_prop_file := $(wildcard $(TARGET_DEVICE_DIR)/system.prop)
-endif
 
 _prop_files_ := \
   $(buildinfo_prop) \