diff --git a/core/Makefile b/core/Makefile
index 1f2160d..1c3ab75 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -2286,69 +2286,58 @@
 
 
 # -----------------------------------------------------------------
+# Build debug ramdisk and debug boot image.
+ifneq ($(BUILDING_DEBUG_BOOT_IMAGE)$(BUILDING_DEBUG_VENDOR_BOOT_IMAGE),)
+
+# ramdisk-debug.img will merge the content from either ramdisk.img or
+# ramdisk-recovery.img, depending on whether BOARD_USES_RECOVERY_AS_BOOT
+# is set or not.
+# INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP would ensure INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR is created.
+ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
+  INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
+  INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP := $(recovery_ramdisk)
+else  # BOARD_USES_RECOVERY_AS_BOOT == true
+  INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
+  INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP := $(INSTALLED_RAMDISK_TARGET)
+endif # BOARD_USES_RECOVERY_AS_BOOT != true
+
+# -----------------------------------------------------------------
 # the debug ramdisk, which is the original ramdisk plus additional
 # files: force_debuggable, adb_debug.prop and userdebug sepolicy.
 # When /force_debuggable is present, /init will load userdebug sepolicy
 # and property files to allow adb root, if the device is unlocked.
-ifneq ($(BUILDING_DEBUG_BOOT_IMAGE)$(BUILDING_DEBUG_VENDOR_BOOT_IMAGE),)
-
-BUILT_DEBUG_RAMDISK_TARGET := $(PRODUCT_OUT)/ramdisk-debug.img
-INSTALLED_DEBUG_RAMDISK_TARGET := $(BUILT_DEBUG_RAMDISK_TARGET)
+INSTALLED_DEBUG_RAMDISK_TARGET := $(PRODUCT_OUT)/ramdisk-debug.img
 
 INTERNAL_DEBUG_RAMDISK_FILES := $(filter $(TARGET_DEBUG_RAMDISK_OUT)/%, \
     $(ALL_GENERATED_SOURCES) \
     $(ALL_DEFAULT_INSTALLED_MODULES))
 
+# INSTALLED_FILES_FILE_DEBUG_RAMDISK would ensure TARGET_DEBUG_RAMDISK_OUT is created.
 INSTALLED_FILES_FILE_DEBUG_RAMDISK := $(PRODUCT_OUT)/installed-files-ramdisk-debug.txt
 INSTALLED_FILES_JSON_DEBUG_RAMDISK := $(INSTALLED_FILES_FILE_DEBUG_RAMDISK:.txt=.json)
 $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): .KATI_IMPLICIT_OUTPUTS := $(INSTALLED_FILES_JSON_DEBUG_RAMDISK)
-
-# ramdisk-debug.img will merge the content from either ramdisk.img or
-# ramdisk-recovery.img, depending on whether BOARD_USES_RECOVERY_AS_BOOT
-# is set or not.
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
-  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): $(recovery_ramdisk)
-else
-  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
-  $(INSTALLED_FILES_FILE_DEBUG_RAMDISK): $(INSTALLED_RAMDISK_TARGET)
-endif # BOARD_USES_RECOVERY_AS_BOOT
-
+$(INSTALLED_FILES_FILE_DEBUG_RAMDISK): $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP)
 $(INSTALLED_FILES_FILE_DEBUG_RAMDISK) : $(INTERNAL_DEBUG_RAMDISK_FILES) $(FILESLIST) $(FILESLIST_UTIL)
 	@echo Installed file list: $@
 	mkdir -p $(dir $@)
 	rm -f $@
-	$(FILESLIST) $(TARGET_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) > $(@:.txt=.json)
+	$(FILESLIST) $(TARGET_DEBUG_RAMDISK_OUT) $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR) > $(@:.txt=.json)
 	$(FILESLIST_UTIL) -c $(@:.txt=.json) > $@
 
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-  $(INSTALLED_DEBUG_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
-  $(INSTALLED_DEBUG_RAMDISK_TARGET): $(recovery_ramdisk)
-else
-  $(INSTALLED_DEBUG_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
-  $(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_RAMDISK_TARGET)
-endif # BOARD_USES_RECOVERY_AS_BOOT
-
 $(INSTALLED_DEBUG_RAMDISK_TARGET): $(INSTALLED_FILES_FILE_DEBUG_RAMDISK)
+$(INSTALLED_DEBUG_RAMDISK_TARGET): $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP)
 $(INSTALLED_DEBUG_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_DEBUG_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
 	$(call pretty,"Target debug ramdisk: $@")
 	mkdir -p $(TARGET_DEBUG_RAMDISK_OUT)
 	touch $(TARGET_DEBUG_RAMDISK_OUT)/force_debuggable
-	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
 
 .PHONY: ramdisk_debug-nodeps
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-  ramdisk_debug-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
-else
-  ramdisk_debug-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
-endif # BOARD_USES_RECOVERY_AS_BOOT
 ramdisk_debug-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
 	echo "make $@: ignoring dependencies"
-	mkdir -p $(TARGET_DEBUG_RAMDISK_OUT)
+	mkdir -p $(TARGET_DEBUG_RAMDISK_OUT) $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR)
 	touch $(TARGET_DEBUG_RAMDISK_OUT)/force_debuggable
-	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_DEBUG_RAMDISK_TARGET)
-
-endif # BUILDING_DEBUG_BOOT_IMAGE || BUILDING_DEBUG_VENDOR_BOOT_IMAGE
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_DEBUG_RAMDISK_OUT) $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_DEBUG_RAMDISK_TARGET)
 
 # -----------------------------------------------------------------
 # the boot-debug.img, which is the kernel plus ramdisk-debug.img
@@ -2365,10 +2354,11 @@
 endif
 
 # Replace ramdisk.img in $(MKBOOTIMG) ARGS with ramdisk-debug.img to build boot-debug.img
+$(INSTALLED_DEBUG_BOOTIMAGE_TARGET): $(INSTALLED_DEBUG_RAMDISK_TARGET)
 ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-  INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(recovery_ramdisk),$(INSTALLED_DEBUG_RAMDISK_TARGET), $(INTERNAL_RECOVERYIMAGE_ARGS))
+  INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP),$(INSTALLED_DEBUG_RAMDISK_TARGET),$(INTERNAL_RECOVERYIMAGE_ARGS))
 else
-  INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(INSTALLED_RAMDISK_TARGET),$(INSTALLED_DEBUG_RAMDISK_TARGET), $(INTERNAL_BOOTIMAGE_ARGS))
+  INTERNAL_DEBUG_BOOTIMAGE_ARGS := $(subst $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP),$(INSTALLED_DEBUG_RAMDISK_TARGET),$(INTERNAL_BOOTIMAGE_ARGS))
 endif
 
 # If boot.img is chained but boot-debug.img is not signed, libavb in bootloader
@@ -2402,7 +2392,7 @@
 endef
 
 # Depends on original boot.img and ramdisk-debug.img, to build the new boot-debug.img
-$(INSTALLED_DEBUG_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INSTALLED_BOOTIMAGE_TARGET) $(INSTALLED_DEBUG_RAMDISK_TARGET) $(BOARD_GKI_SIGNING_KEY_PATH) $(AVBTOOL)
+$(INSTALLED_DEBUG_BOOTIMAGE_TARGET): $(MKBOOTIMG) $(INSTALLED_BOOTIMAGE_TARGET) $(BOARD_GKI_SIGNING_KEY_PATH) $(AVBTOOL)
 	$(call pretty,"Target boot debug image: $@")
 	$(call build-debug-bootimage-target, $@)
 
@@ -2492,10 +2482,7 @@
 # -----------------------------------------------------------------
 # The test harness ramdisk, which is based off debug_ramdisk, plus a
 # few additional test-harness-specific properties in adb_debug.prop.
-ifneq ($(BUILDING_DEBUG_BOOT_IMAGE)$(BUILDING_DEBUG_VENDOR_BOOT_IMAGE),)
-
-BUILT_TEST_HARNESS_RAMDISK_TARGET := $(PRODUCT_OUT)/ramdisk-test-harness.img
-INSTALLED_TEST_HARNESS_RAMDISK_TARGET := $(BUILT_TEST_HARNESS_RAMDISK_TARGET)
+INSTALLED_TEST_HARNESS_RAMDISK_TARGET := $(PRODUCT_OUT)/ramdisk-test-harness.img
 
 # Appends a few test harness specific properties into the adb_debug.prop.
 TEST_HARNESS_PROP_TARGET := $(TARGET_TEST_HARNESS_RAMDISK_OUT)/adb_debug.prop
@@ -2515,38 +2502,22 @@
     $(ALL_GENERATED_SOURCES) \
     $(ALL_DEFAULT_INSTALLED_MODULES))
 
-# ramdisk-test-harness.img will merge the content from either ramdisk.img or
-# ramdisk-recovery.img, depending on whether BOARD_USES_RECOVERY_AS_BOOT is set
-# or not.
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
-  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(recovery_ramdisk)
-else
-  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
-  $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INSTALLED_RAMDISK_TARGET)
-endif # BOARD_USES_RECOVERY_AS_BOOT
-
 # The test harness ramdisk will rsync the files from the debug ramdisk, then appends some props.
 $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INSTALLED_DEBUG_RAMDISK_TARGET)
+$(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DEP)
 $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET): $(MKBOOTFS) $(INTERNAL_TEST_HARNESS_RAMDISK_FILES) | $(COMPRESSION_COMMAND_DEPS)
 	$(call pretty,"Target test harness ramdisk: $@")
 	rsync --chmod=u+w -a $(TARGET_DEBUG_RAMDISK_OUT)/ $(TARGET_TEST_HARNESS_RAMDISK_OUT)
 	$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
-	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_TEST_HARNESS_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_TEST_HARNESS_RAMDISK_OUT) $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $@
 
 .PHONY: ramdisk_test_harness-nodeps
-ifeq ($(BOARD_USES_RECOVERY_AS_BOOT),true)
-  ramdisk_test_harness-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RECOVERY_ROOT_OUT)
-else
-  ramdisk_test_harness-nodeps: PRIVATE_ADDITIONAL_DIR := $(TARGET_RAMDISK_OUT)
-endif # BOARD_USES_RECOVERY_AS_BOOT
 ramdisk_test_harness-nodeps: $(MKBOOTFS) | $(COMPRESSION_COMMAND_DEPS)
 	echo "make $@: ignoring dependencies"
 	rsync --chmod=u+w -a $(TARGET_DEBUG_RAMDISK_OUT)/ $(TARGET_TEST_HARNESS_RAMDISK_OUT)
 	$(call append-test-harness-props,$(ADDITIONAL_TEST_HARNESS_PROPERTIES),$(TEST_HARNESS_PROP_TARGET))
-	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_TEST_HARNESS_RAMDISK_OUT) $(PRIVATE_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET)
-
-endif # BUILDING_DEBUG_BOOT_IMAGE || BUILDING_DEBUG_VENDOR_BOOT_IMAGE
+	mkdir -p $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR)
+	$(MKBOOTFS) -d $(TARGET_OUT) $(TARGET_TEST_HARNESS_RAMDISK_OUT) $(INTERNAL_DEBUG_RAMDISK_ADDITIONAL_DIR) | $(COMPRESSION_COMMAND) > $(INSTALLED_TEST_HARNESS_RAMDISK_TARGET)
 
 # -----------------------------------------------------------------
 # the boot-test-harness.img, which is the kernel plus ramdisk-test-harness.img
@@ -2639,6 +2610,8 @@
 
 endif # BUILDING_DEBUG_VENDOR_BOOT_IMAGE
 
+endif # BUILDING_DEBUG_BOOT_IMAGE || BUILDING_DEBUG_VENDOR_BOOT_IMAGE
+
 
 # Creates a compatibility symlink between two partitions, e.g. /system/vendor to /vendor
 # $1: from location (e.g $(TARGET_OUT)/vendor)