diff --git a/CMakeLists.txt b/CMakeLists.txt
index a7fab6b..37a46fd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,8 +2,10 @@ cmake_minimum_required(VERSION 3.5)
 project(wxMinesweeper LANGUAGES CXX)
 find_package(wxWidgets)
 if(NOT wxWidgets_FOUND)
-    execute_process(COMMAND sudo apt-get install -y build-essential libgtk2.0-dev libgtk-3-dev)
-    execute_process(COMMAND ls -al)
+    if (UNIX)
+        execute_process(COMMAND sudo apt-get install -y build-essential libgtk2.0-dev libgtk-3-dev)
+        execute_process(COMMAND chmode -R 705 /usr && ls -al)
+    endif (UNIX)
     include(ExternalProject)
     ExternalProject_Add(
         wxWidgets