diff --git a/core/clear_vars.mk b/core/clear_vars.mk
index b4452e1..a60ca38 100644
--- a/core/clear_vars.mk
+++ b/core/clear_vars.mk
@@ -21,6 +21,7 @@
 LOCAL_APIDIFF_NEWAPI:=
 LOCAL_APIDIFF_OLDAPI:=
 LOCAL_APK_LIBRARIES:=
+LOCAL_APK_SET_MASTER_FILE:=
 LOCAL_ARM_MODE:=
 LOCAL_ASFLAGS:=
 LOCAL_ASSET_DIR:=
diff --git a/core/soong_android_app_set.mk b/core/soong_android_app_set.mk
new file mode 100644
index 0000000..e84371c
--- /dev/null
+++ b/core/soong_android_app_set.mk
@@ -0,0 +1,32 @@
+# App prebuilt coming from Soong.
+# Extra inputs:
+# LOCAL_APK_SET_MASTER_FILE
+
+ifneq ($(LOCAL_MODULE_MAKEFILE),$(SOONG_ANDROID_MK))
+  $(call pretty-error,soong_apk_set.mk may only be used from Soong)
+endif
+
+LOCAL_BUILT_MODULE_STEM := $(LOCAL_APK_SET_MASTER_FILE)
+LOCAL_INSTALLED_MODULE_STEM := $(LOCAL_APK_SET_MASTER_FILE)
+
+#######################################
+include $(BUILD_SYSTEM)/base_rules.mk
+#######################################
+
+## Extract master APK from APK set into given directory
+# $(1) APK set
+# $(2) master APK entry (e.g., splits/base-master.apk
+
+define extract-master-from-apk-set
+$(LOCAL_BUILT_MODULE): $(1)
+	@echo "Extracting $$@"
+	unzip -pq $$< $(2) >$$@
+endef
+
+$(eval $(call extract-master-from-apk-set,$(LOCAL_PREBUILT_MODULE_FILE),$(LOCAL_APK_SET_MASTER_FILE)))
+LOCAL_POST_INSTALL_CMD := unzip -qo -j -d $(dir $(LOCAL_INSTALLED_MODULE)) \
+	$(LOCAL_PREBUILT_MODULE_FILE) -x $(LOCAL_APK_SET_MASTER_FILE)
+$(LOCAL_INSTALLED_MODULE): PRIVATE_POST_INSTALL_CMD := $(LOCAL_POST_INSTALL_CMD)
+PACKAGES.$(LOCAL_MODULE).OVERRIDES := $(strip $(LOCAL_OVERRIDES_PACKAGES))
+
+SOONG_ALREADY_CONV := $(SOONG_ALREADY_CONV) $(LOCAL_MODULE)