diff --git a/nixos/modules/misc/label.nix b/nixos/modules/misc/label.nix
index c7177f65a0fd..aba5ae23dc39 100644
--- a/nixos/modules/misc/label.nix
+++ b/nixos/modules/misc/label.nix
@@ -1,7 +1,4 @@
 { config, lib, ... }:
-
-with lib;
-
 let
   cfg = config.system.nixos;
 in
@@ -10,8 +7,8 @@ in
 
   options.system = {
 
-    nixos.label = mkOption {
-      type = types.strMatching "[a-zA-Z0-9:_\\.-]*";
+    nixos.label = lib.mkOption {
+      type = lib.types.strMatching "[a-zA-Z0-9:_\\.-]*";
       description = ''
         NixOS version name to be used in the names of generated
         outputs and boot labels.
@@ -43,8 +40,8 @@ in
       '';
     };
 
-    nixos.tags = mkOption {
-      type = types.listOf types.str;
+    nixos.tags = lib.mkOption {
+      type = lib.types.listOf lib.types.str;
       default = [];
       example = [ "with-xen" ];
       description = ''
@@ -68,9 +65,9 @@ in
   config = {
     # This is set here rather than up there so that changing it would
     # not rebuild the manual
-    system.nixos.label = mkDefault (maybeEnv "NIXOS_LABEL"
-                                             (concatStringsSep "-" ((sort (x: y: x < y) cfg.tags)
-                                              ++ [ (maybeEnv "NIXOS_LABEL_VERSION" cfg.version) ])));
+    system.nixos.label = lib.mkDefault (lib.maybeEnv "NIXOS_LABEL"
+                                             (lib.concatStringsSep "-" ((lib.sort (x: y: x < y) cfg.tags)
+                                              ++ [ (lib.maybeEnv "NIXOS_LABEL_VERSION" cfg.version) ])));
   };
 
 }