No wait, testing isn't excalibur anymore!

Author: NexusSfan

README.md

@@ -20,6 +20,8 @@ sudo apt-get update
 sudo apt-get install xlibre xlibre-archive-keyring
 ```
 
+If you are using Devuan Testing (Freia) then use `Components: testing`
+
 If you wish to uninstall XLibre and return to Xorg:
 ```sh
 sudo apt-get update