Use install paths in installed cmake files

double-conversionConfig.cmake.in

diff --git a/double-conversionConfig.cmake.in b/double-conversionConfig.cmake.in
index bbe784b..6c967f4 100644
--- a/double-conversionConfig.cmake.in
+++ b/double-conversionConfig.cmake.in
@@ -8,10 +8,9 @@
 if(EXISTS "${double-conversion_CMAKE_DIR}/CMakeCache.txt")
   include("${double-conversion_CMAKE_DIR}/double-conversionBuildTreeSettings.cmake")
 else()
-  set(double-conversion_INCLUDE_DIRS
-    "${double-conversion_CMAKE_DIR}/@CONF_REL_INCLUDE_DIR@/include/double-conversion")
+  set(double-conversion_INCLUDE_DIRS "@INCLUDE_INSTALL_DIR@/double-conversion")
 endif()
 
-include("${double-conversion_CMAKE_DIR}/double-conversionLibraryDepends.cmake")
+include("@LIB_INSTALL_DIR@/cmake/double-conversion/double-conversionLibraryDepends.cmake")
 
 set(double-conversion_LIBRARIES double-conversion)