diff --git a/nixos-infect b/nixos-infect
index 06f0171..0f32763 100644
--- a/nixos-infect
+++ b/nixos-infect
@@ -382,7 +382,7 @@ infect() {
   /nix/var/nix/profiles/system/bin/switch-to-configuration boot
 }
 
-if [ ! -v PROVIDER ]; then
+if [ ! -v $PROVIDER ]; then
   autodetectProvider
 fi