diff --git a/core/config.mk b/core/config.mk
index 0f9f112..e4dfe3a 100644
--- a/core/config.mk
+++ b/core/config.mk
@@ -506,22 +506,12 @@
 # Tools that are prebuilts for TARGET_BUILD_APPS
 #
 ifeq (,$(TARGET_BUILD_APPS)$(filter true,$(TARGET_BUILD_PDK)))
-  AIDL := $(HOST_OUT_EXECUTABLES)/aidl
   AAPT := $(HOST_OUT_EXECUTABLES)/aapt
-  AAPT2 := $(HOST_OUT_EXECUTABLES)/aapt2
   MAINDEXCLASSES := $(HOST_OUT_EXECUTABLES)/mainDexClasses
-  SIGNAPK_JAR := $(HOST_OUT_JAVA_LIBRARIES)/signapk$(COMMON_JAVA_PACKAGE_SUFFIX)
-  SIGNAPK_JNI_LIBRARY_PATH := $(HOST_OUT_SHARED_LIBRARIES)
-  ZIPALIGN := $(HOST_OUT_EXECUTABLES)/zipalign
 
 else # TARGET_BUILD_APPS || TARGET_BUILD_PDK
-  AIDL := $(prebuilt_build_tools_bin)/aidl
   AAPT := $(prebuilt_sdk_tools_bin)/aapt
-  AAPT2 := $(prebuilt_sdk_tools_bin)/aapt2
   MAINDEXCLASSES := $(prebuilt_sdk_tools)/mainDexClasses
-  SIGNAPK_JAR := $(prebuilt_sdk_tools)/lib/signapk$(COMMON_JAVA_PACKAGE_SUFFIX)
-  SIGNAPK_JNI_LIBRARY_PATH := $(prebuilt_sdk_tools)/$(HOST_OS)/lib64
-  ZIPALIGN := $(prebuilt_build_tools_bin)/zipalign
 endif # TARGET_BUILD_APPS || TARGET_BUILD_PDK
 
 ifeq (,$(TARGET_BUILD_APPS))
@@ -542,12 +532,11 @@
 FILESLIST := $(SOONG_HOST_OUT_EXECUTABLES)/fileslist
 FILESLIST_UTIL :=$= build/make/tools/fileslist_util.py
 HOST_INIT_VERIFIER := $(HOST_OUT_EXECUTABLES)/host_init_verifier
-SOONG_JAVAC_WRAPPER := $(SOONG_HOST_OUT_EXECUTABLES)/soong_javac_wrapper
-SOONG_ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/soong_zip
-MERGE_ZIPS := $(SOONG_HOST_OUT_EXECUTABLES)/merge_zips
 XMLLINT := $(SOONG_HOST_OUT_EXECUTABLES)/xmllint
-ZIP2ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/zip2zip
-ZIPTIME := $(prebuilt_build_tools_bin)/ziptime
+
+# SOONG_ZIP is exported by Soong, but needs to be defined early for
+# $OUT/dexpreopt.global.  It will be verified against the Soong version.
+SOONG_ZIP := $(SOONG_HOST_OUT_EXECUTABLES)/soong_zip
 
 # ---------------------------------------------------------------
 # Generic tools.
diff --git a/core/definitions.mk b/core/definitions.mk
index f32a995..d54fd90 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -2270,7 +2270,7 @@
 # $(1): the package file we are signing.
 define sign-package-arg
 $(hide) mv $(1) $(1).unsigned
-$(hide) $(JAVA) -Djava.library.path=$(SIGNAPK_JNI_LIBRARY_PATH) -jar $(SIGNAPK_JAR) \
+$(hide) $(JAVA) -Djava.library.path=$$(dirname $(SIGNAPK_JNI_LIBRARY_PATH)) -jar $(SIGNAPK_JAR) \
     $(PRIVATE_CERTIFICATE) $(PRIVATE_PRIVATE_KEY) \
     $(PRIVATE_ADDITIONAL_CERTIFICATES) $(1).unsigned $(1).signed
 $(hide) mv $(1).signed $(1)
diff --git a/core/package_internal.mk b/core/package_internal.mk
index 2130058..c06a63c 100644
--- a/core/package_internal.mk
+++ b/core/package_internal.mk
@@ -452,7 +452,7 @@
 certificate := $(LOCAL_CERTIFICATE).x509.pem
 additional_certificates := $(foreach c,$(LOCAL_ADDITIONAL_CERTIFICATES), $(c).x509.pem $(c).pk8)
 
-$(LOCAL_BUILT_MODULE): $(private_key) $(certificate) $(SIGNAPK_JAR)
+$(LOCAL_BUILT_MODULE): $(private_key) $(certificate) $(SIGNAPK_JAR) $(SIGNAPK_JNI_LIBRARY_PATH)
 $(LOCAL_BUILT_MODULE): PRIVATE_PRIVATE_KEY := $(private_key)
 $(LOCAL_BUILT_MODULE): PRIVATE_CERTIFICATE := $(certificate)