diff --git a/etc/functions b/etc/functions
index 5f02974..5c7e729 100644
--- a/etc/functions
+++ b/etc/functions
@@ -8,11 +8,13 @@ header() {
         if [ "$DEBUG" -ge "1" ]; then
                 echo please enter enter
                 read a
-                if [ "$a" -ge "2" ]; then
-                        set -x
-		fi
-                if [ "$a" == "0" ]; then
-			DEBUG=0
+                if [ "${a}" ]; then
+                        if [ "$a" -ge "2" ]; then
+                                set -x
+		      fi
+                        if [ "$a" == "0" ]; then
+		      	       DEBUG=0
+                        fi
                 fi
         fi
 	clear
diff --git a/main.sh b/main.sh
index 5bde146..969d802 100755
--- a/main.sh
+++ b/main.sh
@@ -376,8 +376,16 @@ add_arg_pkg() {
 	for i in "${@}"; do
 		if xbps-query -Rs ${i}|awk '{print $2}'|grep "^${i}" >/dev/null; then
 			addpkg "${@}"
+		else
+			na_pkg+=("${i}")
 		fi
 	done
+	if [ "${#na_pkg[@]}" -gt "0" ]; then
+		echo "package$(if [ ${#na_pkg[@]} -gt 1 ]; then printf "s"; fi) ${na_pkg[@]} not available"
+		if ! yesno "exit?" n; then
+			exit 1
+		fi
+	fi
 }
 
 target_phy_disk
@@ -394,6 +402,7 @@ base
 profile
 network
 printing
+add_arg_pkg "${@}"
 
 header "Do installation"
 if [ "${DEBUG}" -ge "1" ]; then
@@ -403,7 +412,6 @@ if ! yesno "Do you really wanna install?" n; then
 	exit
 fi
 
-add_arg_pkg "${@}"
 
 do_partition
 do_install