diff --git a/vargix-os b/vargix-os
index cf94571..9a97b1a 100755
--- a/vargix-os
+++ b/vargix-os
@@ -58,7 +58,7 @@ start () {
 
 doBuild () {
     logo
-    sudo nixos-rebuild switch -I nixos-config=$scriptDIR/$hostname.nix
+    sudo nixos-rebuild switch -I nixos-config=$scriptDIR/$hostname.nix --upgrade
     echo Finished .. press any key to continue
     read -n 1
     return 0