diff --git a/CMakeLists.txt b/CMakeLists.txt
index a955bfae..7c601c07 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,11 @@
 cmake_minimum_required(VERSION 3.16)
 
 project(Textractor)
+
+if (NOT MSVC)
+	message(FATAL_ERROR "Textractor can only be built with Visual Studio")
+endif()
+
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
 add_compile_options(
diff --git a/cmake/QtUtils.cmake b/cmake/QtUtils.cmake
index fc92c6e5..0cf9875a 100644
--- a/cmake/QtUtils.cmake
+++ b/cmake/QtUtils.cmake
@@ -1,5 +1,5 @@
 macro(msvc_registry_search)
-	if(NOT EXISTS Qt5_DIR AND MSVC)
+	if(NOT DEFINED Qt5_DIR)
 		# look for user-registry pointing to qtcreator
 		get_filename_component(QT_BIN [HKEY_CURRENT_USER\\Software\\Classes\\Applications\\QtProject.QtCreator.pro\\shell\\Open\\Command] PATH)