diff --git a/vars/ubuntu-18.yml b/vars/ubuntu-18.yml
index 1b5579da8..32b0923b6 100644
--- a/vars/ubuntu-18.yml
+++ b/vars/ubuntu-18.yml
@@ -27,6 +27,3 @@ php_version: 7.2
 # "postgresql_version: 10.3" fails (too detailed for /etc/systemd/system/postgresql-iiab.service on Ubuntu 18.04)
 postgresql_version: 10
 systemd_location: /lib/systemd/system
-# Upgrade Ubuntu 18.04's Calibre 3.21.0 to very latest:
-calibre_via_debs: False
-calibre_via_python: True