diff --git a/install.sh b/install.sh
index 839d018..488d2eb 100644
--- a/install.sh
+++ b/install.sh
@@ -166,9 +166,7 @@ tput cup 15 5
 echo "-> compile multimon-ng................."
 mkdir -p build
 cd build
-# Export environment variable for qt5
-export QT_SELECT=qt5
-qmake ../multimon-ng.pro >> ${boswatch_install_path}/setup_log.txt 2>&1
+qmake -qt=qt5 ../multimon-ng.pro >> ${boswatch_install_path}/setup_log.txt 2>&1
 exitcodefunction $? qmake multimonNG
 
 make >> ${boswatch_install_path}/setup_log.txt 2>&1