diff --git a/tools/install.sh b/tools/install.sh
index 0bbb693..3f5d461 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -12,18 +12,24 @@
 
 set -e
 
-if [ -d /proc/vz ] && [ ! -d /proc/vz/beancounter ] && [ ! $DONTINSTALL ]; then
-	apt-get -yq install curl dialog git nano screen zsh
-else
-	if [ "$UID" != 0 ]; then CMD_PREFIX="sudo"; else CMD_PREFIX=""; fi
+if [ ! -n "$DONTINSTALL" ]; then
+  DONTINSTALL="1"
+fi
+
+if [ ! $DONTINSTALL ]; then
+	if [ -d /proc/vz ] && [ ! -d /proc/vz/beancounter ]; then
+		apt-get -yq install curl dialog git nano screen zsh
+	else
+		if [ "$UID" != 0 ]; then CMD_PREFIX="sudo"; else CMD_PREFIX=""; fi
 
-	if [ "$SHELL" != "$(which zsh)" ]; then
-		echo "$(which zsh)"
-		$CMD_PREFIX echo "enter pass...."
+		if [ "$SHELL" != "$(which zsh)" ]; then
+			echo "$(which zsh)"
+			$CMD_PREFIX echo "enter pass...."
 
-		echo "ok"
+			echo "ok"
 
-		$CMD_PREFIX apt-get -yq install curl dialog git nano zsh
+			$CMD_PREFIX apt-get -yq install curl dialog git nano zsh
+		fi
 	fi
 fi