diff --git a/modules/config/networking.nix b/modules/config/networking.nix
index 562d5144531..18e0b834c98 100644
--- a/modules/config/networking.nix
+++ b/modules/config/networking.nix
@@ -56,5 +56,20 @@ in
           '';
         target = "hosts";
       }
+
+      { # /etc/resolvconf.conf: Configuration for openresolv.
+        source = pkgs.writeText "resolvconf.conf"
+          ''
+            # This is the default, but we must set it here to prevent
+            # a collision with an apparently unrelated environment
+            # variable with the same name exported by dhcpcd.
+            interface_order='lo lo[0-9]*'
+
+            # Invalidate the nscd cache whenever resolv.conf is
+            # regenerated.
+            libc_restart='${pkgs.upstart}/sbin/start invalidate-nscd'
+          '';
+        target = "resolvconf.conf";
+      }
     ];
 }