Added how to use sudo to README

README.md

@@ -18,3 +18,10 @@ bash update.sh
 or just use the alias:
 
 ```rebuild```
+
+## Allowing Sudo to run commands
+
+Edit the sudoers file in /etc, (must be root user or have sudo permissions to edit)
+append the following to secure_path:
+
+```:/home/yourusername/.nix-profile/bin:/nix/var/nix/profiles/default/bin```