diff --git a/build/packages.mk b/build/packages.mk
index a93f2e74fa..36f10dcc9d 100644
--- a/build/packages.mk
+++ b/build/packages.mk
@@ -4,13 +4,13 @@
 # This source file is part of the FoundationDB open source project
 #
 # Copyright 2013-2018 Apple Inc. and the FoundationDB project authors
-# 
+#
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
-# 
+#
 #     http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@@ -26,7 +26,7 @@ PACKAGE_CONTENTS := $(addprefix bin/, $(PACKAGE_BINARIES)) $(addprefix bin/, $(a
 
 packages: TGZ FDBSERVERAPI
 
-TGZ: $(PACKAGE_CONTENTS) versions.target lib/libfdb_java.so
+TGZ: $(PACKAGE_CONTENTS) versions.target lib/libfdb_java.$(DLEXT)
 	@echo "Archiving      tgz"
 	@mkdir -p packages
 	@rm -f packages/FoundationDB-$(PLATFORM)-*.tar.gz