THRIFT-3677 Improve CMake Java build

This closes #897
diff --git a/build/cmake/CPackConfig.cmake b/build/cmake/CPackConfig.cmake
index 45077c0..fdc1b4e 100644
--- a/build/cmake/CPackConfig.cmake
+++ b/build/cmake/CPackConfig.cmake
@@ -58,7 +58,7 @@
         "https://issues.apache.org/jira/browse/THRIFT" "Apache Thrift - Issues")
     set(CPACK_NSIS_CONTACT ${CPACK_PACKAGE_CONTACT})
     set(CPACK_NSIS_MODIFY_PATH "ON")
-    set(CPACK_PACKAGE_INSTALL_DIRECTORY ${CPACK_PACKAGE_NAME})
+    set(CPACK_PACKAGE_INSTALL_DIRECTORY "${CPACK_PACKAGE_NAME}")
 else()
     set(CPACK_GENERATOR "DEB" )
     set(CPACK_DEBIAN_PACKAGE_MAINTAINER ${CPACK_PACKAGE_CONTACT})