diff --git a/src/main b/src/main
index 8e7338d..18cfef2 100755
--- a/src/main
+++ b/src/main
@@ -72,16 +72,14 @@ fi
 
 echo "# required packages"
 echo "==================="
-sudo export DEBIAN_FRONTEND=noninteractive
 for package in ${REQUIRED_PACKAGES[@]}; do 
     runVoid dpkg-query --status $package
     if [ $runVoidError -ne 0 ] ; then    
         echo -n "installing package <$package> ... " ;
-        sudo apt install -y $package
+        sudo DEBIAN_FRONTEND=noninteractive apt install -y $package
         echo "DONE"
     fi
 done
-sudo unset DEBIAN_FRONTEND
 
 echo "## remove hplip annoyance"
 echo "========================="