diff --git a/nixos/modules/services/cluster/kubernetes/addons/dns.nix b/nixos/modules/services/cluster/kubernetes/addons/dns.nix
index a03aa7329a32..485c6f8e2b5f 100644
--- a/nixos/modules/services/cluster/kubernetes/addons/dns.nix
+++ b/nixos/modules/services/cluster/kubernetes/addons/dns.nix
@@ -1,7 +1,4 @@
 { config, options, pkgs, lib, ... }:
-
-with lib;
-
 let
   version = "1.10.1";
   cfg = config.services.kubernetes.addons.dns;
@@ -12,37 +9,37 @@ let
   };
 in {
   options.services.kubernetes.addons.dns = {
-    enable = mkEnableOption "kubernetes dns addon";
+    enable = lib.mkEnableOption "kubernetes dns addon";
 
-    clusterIp = mkOption {
+    clusterIp = lib.mkOption {
       description = "Dns addon clusterIP";
 
       # this default is also what kubernetes users
       default = (
-        concatStringsSep "." (
-          take 3 (splitString "." config.services.kubernetes.apiserver.serviceClusterIpRange
+        lib.concatStringsSep "." (
+          lib.take 3 (lib.splitString "." config.services.kubernetes.apiserver.serviceClusterIpRange
         ))
       ) + ".254";
-      defaultText = literalMD ''
+      defaultText = lib.literalMD ''
         The `x.y.z.254` IP of
         `config.${options.services.kubernetes.apiserver.serviceClusterIpRange}`.
       '';
-      type = types.str;
+      type = lib.types.str;
     };
 
-    clusterDomain = mkOption {
+    clusterDomain = lib.mkOption {
       description = "Dns cluster domain";
       default = "cluster.local";
-      type = types.str;
+      type = lib.types.str;
     };
 
-    replicas = mkOption {
+    replicas = lib.mkOption {
       description = "Number of DNS pod replicas to deploy in the cluster.";
       default = 2;
-      type = types.int;
+      type = lib.types.int;
     };
 
-    reconcileMode = mkOption {
+    reconcileMode = lib.mkOption {
       description = ''
         Controls the addon manager reconciliation mode for the DNS addon.
 
@@ -51,12 +48,12 @@ in {
         See: <https://github.com/kubernetes/kubernetes/blob/master/cluster/addons/addon-manager/README.md>.
       '';
       default = "Reconcile";
-      type = types.enum [ "Reconcile" "EnsureExists" ];
+      type = lib.types.enum [ "Reconcile" "EnsureExists" ];
     };
 
-    coredns = mkOption {
+    coredns = lib.mkOption {
       description = "Docker image to seed for the CoreDNS container.";
-      type = types.attrs;
+      type = lib.types.attrs;
       default = {
         imageName = "coredns/coredns";
         imageDigest = "sha256:a0ead06651cf580044aeb0a0feba63591858fb2e43ade8c9dea45a6a89ae7e5e";
@@ -65,13 +62,13 @@ in {
       };
     };
 
-    corefile = mkOption {
+    corefile = lib.mkOption {
       description = ''
         Custom coredns corefile configuration.
 
         See: <https://coredns.io/manual/toc/#configuration>.
       '';
-      type = types.str;
+      type = lib.types.str;
       default = ''
         .:${toString ports.dns} {
           errors
@@ -87,7 +84,7 @@ in {
           reload
           loadbalance
         }'';
-      defaultText = literalExpression ''
+      defaultText = lib.literalExpression ''
         '''
           .:${toString ports.dns} {
             errors
@@ -108,9 +105,9 @@ in {
     };
   };
 
-  config = mkIf cfg.enable {
+  config = lib.mkIf cfg.enable {
     services.kubernetes.kubelet.seedDockerImages =
-      singleton (pkgs.dockerTools.pullImage cfg.coredns);
+      lib.singleton (pkgs.dockerTools.pullImage cfg.coredns);
 
     services.kubernetes.addonManager.bootstrapAddons = {
       coredns-cr = {
@@ -366,7 +363,7 @@ in {
       };
     };
 
-    services.kubernetes.kubelet.clusterDns = mkDefault [ cfg.clusterIp ];
+    services.kubernetes.kubelet.clusterDns = lib.mkDefault [ cfg.clusterIp ];
   };
 
   meta.buildDocsInSandbox = false;