{ config, lib, pkgs, ... }: with lib; let inInitrd = any (fs: fs == "vfat") config.boot.initrd.supportedFilesystems; in { config = mkIf (any (fs: fs == "vfat") config.boot.supportedFilesystems) { system.fsPackages = [ pkgs.dosfstools ]; boot.initrd.kernelModules = mkIf inInitrd [ "vfat" "nls_cp437" "nls_iso8859-1" ]; boot.initrd.extraUtilsCommands = mkIf inInitrd '' copy_bin_and_libs ${pkgs.dosfstools}/sbin/dosfsck ln -sv dosfsck $out/bin/fsck.vfat ''; }; }