diff -ruN kadu-4.3/cmake/KaduMacros.cmake my/cmake/KaduMacros.cmake
--- kadu-4.3/cmake/KaduMacros.cmake	2017-01-24 22:36:21.000000000 +0100
+++ my/cmake/KaduMacros.cmake	2017-11-03 03:24:17.827054622 +0100
@@ -221,7 +221,7 @@
 
 	if (NOT WIN32)
 		set_target_properties (${KADU_PLUGIN_NAME} PROPERTIES
-			INSTALL_RPATH "${KADU_INSTALL_LIB_DIR}/kadu"
+			INSTALL_RPATH "${KADU_INSTALL_PREFIX}/${KADU_INSTALL_LIB_DIR}/kadu"
 			BUILD_WITH_INSTALL_RPATH TRUE
 		)
 	endif ()