diff --git a/nixos/modules/hardware/network/b43.nix b/nixos/modules/hardware/network/b43.nix
index eb03bf223ccf..fc4020c09a5d 100644
--- a/nixos/modules/hardware/network/b43.nix
+++ b/nixos/modules/hardware/network/b43.nix
@@ -1,7 +1,4 @@
 { config, lib, pkgs, ... }:
-
-with lib;
-
 let kernelVersion = config.boot.kernelPackages.kernel.version; in
 
 {
@@ -10,9 +7,9 @@ let kernelVersion = config.boot.kernelPackages.kernel.version; in
 
   options = {
 
-    networking.enableB43Firmware = mkOption {
+    networking.enableB43Firmware = lib.mkOption {
       default = false;
-      type = types.bool;
+      type = lib.types.bool;
       description = ''
         Turn on this option if you want firmware for the NICs supported by the b43 module.
       '';
@@ -23,7 +20,7 @@ let kernelVersion = config.boot.kernelPackages.kernel.version; in
 
   ###### implementation
 
-  config = mkIf config.networking.enableB43Firmware {
+  config = lib.mkIf config.networking.enableB43Firmware {
     hardware.firmware = [ pkgs.b43Firmware_5_1_138 ];
   };