diff --git a/nix/nixos-module/server/lxc-containers.nix b/nix/nixos-module/server/lxc-containers.nix
index cc2cbff..a9bd5a0 100644
--- a/nix/nixos-module/server/lxc-containers.nix
+++ b/nix/nixos-module/server/lxc-containers.nix
@@ -1,6 +1,16 @@
 { hostName, self, config, lib, pkgs, ... }:
 
 let
+  # Downgrade: lxc-4.0.9 names network interfaces in containers eth0,
+  # and eth1 despite configured differently.
+  lxc = pkgs.lxc.overrideAttrs (_: rec {
+    version = "4.0.6";
+    src = pkgs.fetchurl {
+      url = "https://linuxcontainers.org/downloads/lxc/lxc-${version}.tar.gz";
+      sha256 = "0qz4l7mlhq7hx53q606qgvkyzyr01glsw290v8ppzvxn1fydlrci";
+    };
+  });
+
   # Containers that are run on this host
   containers =
     lib.filterAttrs (_: { role, model, location, ... }:
@@ -134,7 +144,7 @@ in
     '';
   };
 
-  environment.systemPackages = [ pkgs.lxc build-script ];
+  environment.systemPackages = [ lxc build-script ];
 
   # Create lxc.container.conf files
   environment.etc =
@@ -175,7 +185,7 @@ in
           '';
       };
     }) {
-      "lxc/common.conf".source = "${pkgs.lxc}/share/lxc/config/common.conf";
+      "lxc/common.conf".source = "${lxc}/share/lxc/config/common.conf";
     } (builtins.attrNames containers);
 
   # Systemd service template for LXC containers
@@ -185,15 +195,15 @@ in
     unitConfig.ConditionPathExists = "/var/lib/lxc/%i/rootfs/init";
     serviceConfig = {
       Type = "simple";
-      ExecStart = "${pkgs.lxc}/bin/lxc-start -F -C -n %i";
-      ExecStop = "${pkgs.lxc}/bin/lxc-stop -n %i";
+      ExecStart = "${lxc}/bin/lxc-start -F -C -n %i";
+      ExecStop = "${lxc}/bin/lxc-stop -n %i";
       ExecReload =
         let
           script = pkgs.writeScript "reload-lxc-container.sh" ''
             #! ${pkgs.runtimeShell} -e
 
             SYSTEM=$(dirname $(readlink /var/lib/lxc/$1/rootfs/init))
-            exec ${pkgs.lxc}/bin/lxc-attach -n $1 $SYSTEM/bin/switch-to-configuration switch
+            exec ${lxc}/bin/lxc-attach -n $1 $SYSTEM/bin/switch-to-configuration switch
           '';
         in
           "${script} %i";