--- CLHEP/CMakeLists.txt	2016-06-20 14:41:12.000000000 -0500
+++ CLHEP/CMakeLists.txt	2016-06-20 14:40:57.000000000 -0500
@@ -37,7 +37,7 @@
 # If Policy CMP0042 exists, use OLD to prefer the use of install names
 # instead of the new @rpath default. 
 if(POLICY CMP0042)
-  cmake_policy(SET CMP0042 NEW)
+  cmake_policy(SET CMP0042 OLD)
 endif()
 
 set(CMAKE_MODULE_PATH 
