diff --git a/cmake/xo_cxx.cmake b/cmake/xo_cxx.cmake
index 64ec2822..2246fd5d 100644
--- a/cmake/xo_cxx.cmake
+++ b/cmake/xo_cxx.cmake
@@ -165,7 +165,9 @@ endmacro()
 # use this to install typical include file subtree
 #
 macro(xo_install_include_tree)
-    install(DIRECTORY ${PROJECT_SOURCE_DIR}/include/ DESTINATION include)
+    install(
+        DIRECTORY ${PROJECT_SOURCE_DIR}/include/
+        DESTINATION ${CMAKE_INSTALL_PREFIX}/include)
 endmacro()
 
 # ----------------------------------------------------------------
@@ -222,13 +224,10 @@ macro(xo_export_cmake_config projectname projectversion projecttargets)
     )
     install(
         EXPORT ${projecttargets}
-        DESTINATION lib/cmake/${projectname}
-    )
-    install(
         FILES
         "${PROJECT_BINARY_DIR}/${projectname}ConfigVersion.cmake"
         "${PROJECT_BINARY_DIR}/${projectname}Config.cmake"
-        DESTINATION lib/cmake/${projectname}
+        DESTINATION ${CMAKE_INSTALL_PREFIX}/lib/cmake/${projectname}
     )
 endmacro()