diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7d7c284a..b7158325 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,14 +54,14 @@ if(INSTALL_DIR)
   set(INSTALL_DIR_DEFAULT ${INSTALL_DIR})
 endif(INSTALL_DIR)
 
-if(UNIX)
+if(UNIX AND NOT USE_SUPERBUILD)
   message("Checking for write permissions in install directory...")
   execute_process(COMMAND mkdir -p ${CMAKE_INSTALL_PREFIX})
   execute_process(COMMAND test -w ${CMAKE_INSTALL_PREFIX} RESULT_VARIABLE res)
   if(res)
     message(WARNING "No write access at install directory, please set correct permissions")
   endif()
-endif(UNIX)
+endif(UNIX AND NOT USE_SUPERBUILD)
 
 if (USE_SUPERBUILD)
   project (SUPERBUILD)