diff -urN calamares-1.1.4.2/CMakeLists.txt calamares-1.1.4.2-patched/CMakeLists.txt
--- calamares-1.1.4.2/CMakeLists.txt	2015-10-01 01:24:47.000000000 +1000
+++ calamares-1.1.4.2-patched/CMakeLists.txt	2015-10-20 20:07:25.515245745 +1000
@@ -211,7 +211,7 @@
   FILES
       com.github.calamares.calamares.policy
   DESTINATION
-      "${POLKITQT-1_POLICY_FILES_INSTALL_DIR}"
+      "${CMAKE_INSTALL_PREFIX}${POLKITQT5-1_POLICY_FILES_INSTALL_DIR}"
 )
 
 install(