nixpkgs/nixos/modules/hardware/network/b43.nix

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{ config, lib, pkgs, ... }:
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with lib;
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let kernelVersion = config.boot.kernelPackages.kernel.version; in
{
###### interface
options = {
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networking.enableB43Firmware = mkOption {
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default = false;
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type = types.bool;
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description = ''
Turn on this option if you want firmware for the NICs supported by the b43 module.
'';
};
};
###### implementation
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config = mkIf config.networking.enableB43Firmware {
assertions = singleton
{ assertion = lessThan 0 (builtins.compareVersions kernelVersion "3.2");
message = "b43 firmware for kernels older than 3.2 not packaged yet!";
};
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hardware.firmware = [ pkgs.b43Firmware_5_1_138 ];
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};
}