diff --git a/host_vars/charybde.cachan-adm.crans.org.yml b/host_vars/charybde.cachan-adm.crans.org.yml
index 3fe27538..e6d3a88b 100644
--- a/host_vars/charybde.cachan-adm.crans.org.yml
+++ b/host_vars/charybde.cachan-adm.crans.org.yml
@@ -1,4 +1,6 @@
 ---
+debian_mirror: 'file:/pool/mirror/pub/debian'
+
 interfaces:
   cachan_adm: eth0.10
   cachan_srv: eth1.2
diff --git a/host_vars/tealc.adm.crans.org.yml b/host_vars/tealc.adm.crans.org.yml
index d7a9218d..8b12ecb6 100644
--- a/host_vars/tealc.adm.crans.org.yml
+++ b/host_vars/tealc.adm.crans.org.yml
@@ -1,4 +1,6 @@
 ---
+debian_mirror: 'file:/pool/mirror/pub/debian'
+
 loc_postgres:
   version: 13
   hosts: