diff --git a/core/Makefile b/core/Makefile
index 99fb775..245d628 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -1879,6 +1879,7 @@
   $(HOST_OUT_JAVA_LIBRARIES)/dumpkey.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/signapk.jar \
   $(HOST_OUT_JAVA_LIBRARIES)/BootSignature.jar \
+  $(HOST_OUT_JAVA_LIBRARIES)/VeritySigner.jar \
   $(HOST_OUT_EXECUTABLES)/make_ext4fs \
   $(HOST_OUT_EXECUTABLES)/mkuserimg.sh \
   $(HOST_OUT_EXECUTABLES)/mke2fs \
@@ -1942,23 +1943,31 @@
 BUILT_OTATOOLS_PACKAGE := $(PRODUCT_OUT)/otatools.zip
 $(BUILT_OTATOOLS_PACKAGE): zip_root := $(call intermediates-dir-for,PACKAGING,otatools)/otatools
 
-$(BUILT_OTATOOLS_PACKAGE): $(OTATOOLS) | $(ACP)
+OTATOOLS_DEPS := \
+  system/extras/verity/build_verity_metadata.py \
+  system/extras/ext4_utils/mke2fs.conf \
+  $(shell find build/target/product/security -type f -name \*.x509.pem -o -name \*.pk8 -o \
+      -name verity_key | sort) \
+  $(shell find device vendor -type f -name \*.pk8 -o -name verifiedboot\* -o \
+      -name \*.x509.pem -o -name oem\*.prop | sort)
+
+OTATOOLS_RELEASETOOLS := \
+  $(shell find build/tools/releasetools -name \*.pyc -prune -o -type f | sort)
+
+ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT))
+OTATOOLS_DEPS += \
+  $(shell find external/vboot_reference/tests/devkeys -type f | sort)
+endif
+
+$(BUILT_OTATOOLS_PACKAGE): $(OTATOOLS) $(OTATOOLS_DEPS) $(OTATOOLS_RELEASETOOLS) | $(ACP)
 	@echo "Package OTA tools: $@"
 	$(hide) rm -rf $@ $(zip_root)
-	$(hide) mkdir -p $(dir $@) $(zip_root)/bin $(zip_root)/framework $(zip_root)/releasetools $(zip_root)/system/extras/verity $(zip_root)/system/extras/ext4_utils
+	$(hide) mkdir -p $(dir $@) $(zip_root)/bin $(zip_root)/framework $(zip_root)/releasetools
 	$(call copy-files-with-structure,$(OTATOOLS),$(HOST_OUT)/,$(zip_root))
-	$(hide) $(ACP) $(HOST_OUT_JAVA_LIBRARIES)/VeritySigner.jar $(zip_root)/framework/
-	$(hide) $(ACP) -p system/extras/verity/build_verity_metadata.py $(zip_root)/system/extras/verity/
-	$(hide) $(ACP) -p system/extras/ext4_utils/mke2fs.conf $(zip_root)/system/extras/ext4_utils/
 	$(hide) $(ACP) -r -d -p build/tools/releasetools/* $(zip_root)/releasetools
-ifeq (true,$(PRODUCTS.$(INTERNAL_PRODUCT).PRODUCT_SUPPORTS_VBOOT))
-	$(hide) mkdir -p $(zip_root)/external/vboot_reference/tests/devkeys
-	$(hide) $(ACP) -r -d -p external/vboot_reference/tests/devkeys/* $(zip_root)/external/vboot_reference/tests/devkeys
-endif
 	$(hide) rm -rf $@ $(zip_root)/releasetools/*.pyc
 	$(hide) (cd $(zip_root) && zip -qryX $(abspath $@) *)
-	$(hide) zip -qryX $(abspath $@) build/target/product/security/
-	$(hide) find device vendor -name \*.pk8 -o -name verifiedboot\* -o -name \*.x509.pem -o -name oem\*.prop | xargs zip -qryX $(abspath $@)>/dev/null || true
+	$(hide) echo $(OTATOOLS_DEPS) | xargs zip -qryX $(abspath $@)>/dev/null || true
 
 .PHONY: otatools-package
 otatools-package: $(BUILT_OTATOOLS_PACKAGE)