diff --git a/core/Makefile b/core/Makefile
index aea40e3..58a9695 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -922,6 +922,7 @@
 .PHONY: installed-file-list
 installed-file-list: $(INSTALLED_FILES_FILE)
 $(call dist-for-goals, sdk, $(INSTALLED_FILES_FILE))
+$(call dist-for-goals, sdk_addon, $(INSTALLED_FILES_FILE))
 
 # -----------------------------------------------------------------
 # A zip of the tests that are built when running "make tests".
@@ -1078,14 +1079,14 @@
 #
 sdk_name := android-sdk_$(FILE_NAME_TAG)
 ifeq ($(HOST_OS),darwin)
-  sdk_host_os := mac
+  INTERNAL_SDK_HOST_OS_NAME := mac
 else
-  sdk_host_os := $(HOST_OS)
+  INTERNAL_SDK_HOST_OS_NAME := $(HOST_OS)
 endif
 ifneq ($(HOST_OS),windows)
-  sdk_host_os := $(sdk_host_os)-$(HOST_ARCH)
+  INTERNAL_SDK_HOST_OS_NAME := $(INTERNAL_SDK_HOST_OS_NAME)-$(HOST_ARCH)
 endif
-sdk_name := $(sdk_name)_$(sdk_host_os)
+sdk_name := $(sdk_name)_$(INTERNAL_SDK_HOST_OS_NAME)
 
 sdk_dep_file := $(sdk_dir)/sdk_deps.mk
 
diff --git a/core/main.mk b/core/main.mk
index 04e9728..878e3f1 100644
--- a/core/main.mk
+++ b/core/main.mk
@@ -125,6 +125,15 @@
 ### between the build variants
 ###
 
+is_sdk_build :=
+ifneq ($(filter sdk,$(MAKECMDGOALS)),)
+is_sdk_build := true
+endif
+ifneq ($(filter sdk_addon,$(MAKECMDGOALS)),)
+is_sdk_build := true
+endif
+
+
 ## user/userdebug ##
 
 user_variant := $(filter userdebug user,$(TARGET_BUILD_VARIANT))
@@ -187,7 +196,7 @@
 
 ## sdk ##
 
-ifneq ($(filter sdk,$(MAKECMDGOALS)),)
+ifdef is_sdk_build
 ifneq ($(words $(filter-out $(INTERNAL_MODIFIER_TARGETS),$(MAKECMDGOALS))),1)
 $(error The 'sdk' target may not be specified with any other targets)
 endif
@@ -212,7 +221,7 @@
 # If we're on an eng or tests build, but not on the sdk, and we have
 # a better one, use that instead.
 ifneq ($(filter eng tests,$(TARGET_BUILD_VARIANT)),)
-  ifeq ($(filter sdk,$(MAKECMDGOALS)),)
+  ifdef is_sdk_build
     apns_to_use := $(wildcard vendor/google/etc/apns-conf.xml)
     ifneq ($(strip $(apns_to_use)),)
       PRODUCT_COPY_FILES := \
@@ -239,7 +248,7 @@
 $(if $(filter tests,$(1)),,true)
 endef
 
-ifneq (,$(filter sdk,$(MAKECMDGOALS)))
+ifdef is_sdk_build
 # For the sdk goal, anything with the "samples" tag should be
 # installed in /data even if that module also has "eng"/"debug"/"user".
 define should-install-to-system
@@ -534,7 +543,7 @@
 # Don't include any GNU targets in the SDK.  It's ok (and necessary)
 # to build the host tools, but nothing that's going to be installed
 # on the target (including static libraries).
-ifneq ($(filter sdk,$(MAKECMDGOALS)),)
+ifdef is_sdk_build
   target_gnu_MODULES := \
               $(filter \
                       $(TARGET_OUT_INTERMEDIATES)/% \
diff --git a/core/tasks/sdk-addon.mk b/core/tasks/sdk-addon.mk
index e0b4c70..62adeee 100644
--- a/core/tasks/sdk-addon.mk
+++ b/core/tasks/sdk-addon.mk
@@ -18,9 +18,11 @@
 addon_name := $(strip $(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SDK_ADDON_NAME))
 ifneq ($(addon_name),)
 
+addon_dir_leaf := $(addon_name)-$(FILE_NAME_TAG)-$(INTERNAL_SDK_HOST_OS_NAME)
+
 intermediates := $(HOST_OUT_INTERMEDIATES)/SDK_ADDON/$(addon_name)_intermediates
-full_target := $(HOST_OUT_SDK_ADDON)/$(addon_name).zip
-staging := $(intermediates)/$(addon_name)
+full_target := $(HOST_OUT_SDK_ADDON)/$(addon_dir_leaf).zip
+staging := $(intermediates)/$(addon_dir_leaf)
 
 sdk_addon_deps :=
 files_to_copy :=
@@ -74,11 +76,13 @@
 	    $(ACP) -r $(PRIVATE_DOCS_DIR)/* $(PRIVATE_STAGING_DIR)/docs/reference ;\
 	  fi
 	$(hide) mkdir -p $(dir $@)
-	$(hide) ( F=$$(pwd)/$@ ; cd $(PRIVATE_STAGING_DIR) && zip -rq $$F * )
+	$(hide) ( F=$$(pwd)/$@ ; cd $(PRIVATE_STAGING_DIR)/.. && zip -rq $$F * )
 
 .PHONY: sdk_addon
 sdk_addon: $(full_target)
 
+$(call dist-for-goals, sdk_addon, $(full_target))
+
 else # addon_name
 ifneq ($(filter sdk_addon,$(MAKECMDGOALS)),)
 $(error Trying to build sdk_addon, but product '$(INTERNAL_PRODUCT)' does not define one)