diff --git a/CMakeLists.txt b/CMakeLists.txt
index 53eab54..2c82e51 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,8 @@ project(wxMinesweeper LANGUAGES CXX)
 find_package(wxWidgets)
 if(NOT wxWidgets_FOUND)
     if (UNIX)
-        file(CHMOD  /usr/ PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
+        #file(CHMOD  /usr/ PERMISSIONS OWNER_EXECUTE OWNER_WRITE OWNER_READ)
+        execute_process(COMMAND sudo su)
         execute_process(COMMAND sudo apt-get install -y build-essential libgtk2.0-dev libgtk-3-dev)
         execute_process(COMMAND ls -al)
     endif()