diff --git a/pxe-server/configuration.nix b/pxe-server/configuration.nix
index dba5485..ade355e 100644
--- a/pxe-server/configuration.nix
+++ b/pxe-server/configuration.nix
@@ -161,7 +161,7 @@ in
   # a besoin d'une IP fixe = serverIp, pas d'un bail DHCP. On l'exclut de
   # NetworkManager pour éviter tout conflit avec l'assignation statique
   # ci-dessous.
-  networking.networkmanager.unmanaged = [ interface ];
+  networking.networkmanager.unmanaged = [ "interface-name:${interface}" ];
   networking.interfaces.${interface}.ipv4.addresses = [
     {
       address = serverIp;