diff --git a/.gitignore b/.gitignore
index 577b0a0..eefc1b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 hardware-configuration.nix
+backup
diff --git a/sync.sh b/sync.sh
index b2cda7c..f3543ca 100755
--- a/sync.sh
+++ b/sync.sh
@@ -1,4 +1,5 @@
-#!/bin/bash
+#!/bin/sh
 
+cp -r /etc/nixos/ ./backup
 sudo cp ./configuration.nix /etc/nixos/configuration.nix
 sudo nixos-rebuild switch --upgrade