diff --git a/core/soong_android_app_set.mk b/core/soong_android_app_set.mk
index f994165..ec3d8c8 100644
--- a/core/soong_android_app_set.mk
+++ b/core/soong_android_app_set.mk
@@ -6,9 +6,8 @@
   $(call pretty-error,soong_apk_set.mk may only be used from Soong)
 endif
 
-LOCAL_BUILT_MODULE_STEM := $(LOCAL_APK_SET_INSTALL_FILE)
-LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_APK_SET_INSTALL_FILE)
-
+LOCAL_BUILT_MODULE_STEM := package.apk
+LOCAL_INSTALLED_MODULE_STEM := $(notdir $(LOCAL_PREBUILT_MODULE_FILE))
 
 # Use the Soong output as the checkbuild target instead of LOCAL_BUILT_MODULE
 # to avoid checkbuilds making an extra copy of every module.
@@ -18,22 +17,8 @@
 include $(BUILD_SYSTEM)/base_rules.mk
 #######################################
 
-## Extract master APK from APK set into given directory
-# $(1) APK set
-# $(2) APK entry to install (e.g., splits/base.apk
+$(eval $(call copy-one-file,$(LOCAL_PREBUILT_MODULE_FILE),$(LOCAL_BUILT_MODULE)))
 
-define extract-install-file-from-apk-set
-$(LOCAL_BUILT_MODULE): $(1)
-	@echo "Extracting $$@"
-	unzip -pq $$< $(2) >$$@
-endef
-
-$(eval $(call extract-install-file-from-apk-set,$(LOCAL_PREBUILT_MODULE_FILE),$(LOCAL_APK_SET_INSTALL_FILE)))
-# unzip returns 11 it there was nothing to extract, which is expected,
-# $(LOCAL_APK_SET_INSTALL_FILE) has is already there.
-LOCAL_POST_INSTALL_CMD := unzip -qoDD -j -d $(dir $(LOCAL_INSTALLED_MODULE)) \
-	$(LOCAL_PREBUILT_MODULE_FILE) -x $(LOCAL_APK_SET_INSTALL_FILE) || [[ $$? -eq 11 ]]
-$(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
 PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
 
 PACKAGES := $(PACKAGES) $(LOCAL_MODULE)