Issue building linux kernel modules after Flake update

[termg@nixos:~]$ nix --version
nix (Nix) 2.18.8

[termg@nixos:~]$ sudo nix-channel --update nixos; nixos-rebuild switch
[sudo] password for termg:
error: reading symbolic link ‘/nix/var/nix/profiles/per-user/root/channels/nixpkgs’: No such file or directory
building Nix…

Not using flakes. Set to unstable. Edited configuration. For some reason it is not recognizing it. Config: Look near bottom for the change

# Edit this configuration file to define what should be installed on
# your system.  Help is available in the configuration.nix(5) man page
# and in the NixOS manual (accessible by running ‘nixos-help’).

{ config, lib,  pkgs, ... }:

{
  imports =
    [ # Include the results of the hardware scan.
      ./hardware-configuration.nix
    ];

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;

  networking.hostName = "nixos"; # Define your hostname.
  # networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.

  # Configure network proxy if necessary
  # networking.proxy.default = "http://user:password@proxy:port/";
  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";

  # Enable networking
  networking.networkmanager.enable = true;

  # Bluetooth
  hardware.bluetooth.enable = true; # enables support for Bluetooth
  hardware.bluetooth.powerOnBoot = true; # powers up the default Bluetooth controller on boot
  services.blueman.enable = true;


  # Set your time zone.
  time.timeZone = "America/New_York";

  # Select internationalisation properties.
  i18n.defaultLocale = "en_US.UTF-8";

  i18n.extraLocaleSettings = {
    LC_ADDRESS = "en_US.UTF-8";
    LC_IDENTIFICATION = "en_US.UTF-8";
    LC_MEASUREMENT = "en_US.UTF-8";
    LC_MONETARY = "en_US.UTF-8";
    LC_NAME = "en_US.UTF-8";
    LC_NUMERIC = "en_US.UTF-8";
    LC_PAPER = "en_US.UTF-8";
    LC_TELEPHONE = "en_US.UTF-8";
    LC_TIME = "en_US.UTF-8";
  };

  # Enable the X11 windowing system.
  services.xserver.enable = true;

  # Enable the KDE Plasma Desktop Environment.
  services.displayManager.sddm.enable = true;
  services.desktopManager.plasma6.enable = true;

  # Configure keymap in X11
  services.xserver = {
    xkb.layout = "us";
    xkb.variant = "";
  };

  # Enable CUPS to print documents.
  services.printing.enable = true;

  services.avahi = {
    enable = true;
    nssmdns4 = true;
    openFirewall = true;
  };

  # Steam and Flatpak

  services.flatpak.enable = true;
  xdg.portal.enable = true;

  # Enable sound with pipewire.
  #sound.enable = true;
  services.pulseaudio.enable = false;
  security.rtkit.enable = true;
  services.pipewire = {
    enable = true;
    alsa.enable = true;
    alsa.support32Bit = true;
    pulse.enable = true;
    # If you want to use JACK applications, uncomment this
    #jack.enable = true;

    # use the example session manager (no others are packaged yet so this is enabled by default,
    # no need to redefine it in your config for now)
    #media-session.enable = true;
  };

  # Enable touchpad support (enabled default in most desktopManager).
  # services.xserver.libinput.enable = true;

  # Define a user account. Don't forget to set a password with ‘passwd’.
  users.users.termg = {
    isNormalUser = true;
    description = "Term Grecos";
    extraGroups = [ "networkmanager" "wheel" "scanner" "lp" "dialout" ];
    packages = with pkgs; [
      firefox
      libsForQt5.kate
      kicad
      calibre
      freecad
      amdgpu_top      
      i2pd
      jellyfin
      libsForQt5.kdenlive
      krita
      leocad
      libreoffice
      minetest
      lutris
      megasync
      mpv
      obs-studio
      onionshare
      qtox
      prusa-slicer
      remmina
      transmission_4
      qemu
      vscodium
      waydroid
      teams-for-linux
      discord
      lbry
      docker
      gnupg
      openssl
      pinentry
      openvswitch
      virt-manager
      libvirt
      zulu
      xautoclick
      distrobox
      #tor-browser
      anki
      libsForQt5.kcalc
      wine
      yt-dlp
      simple-scan
      epsonscan2
#      python
      python3
      simplex-chat-desktop
      arti
      cargo
      fw-ectool
      wasm-tools
      jan
      envision
      monado
      alvr
      sidequest
      unetbootin
      usbimager
      flatpak
      git
      curl
      #gnome-shell-extension-fw-fanctrl
      fwupd
      dmidecode
      gamescope
      protonup-qt
      protonup-ng
      gamehub
      diskscan
      nwipe
      dysk
      gparted
#      super-slicer
      spotify
      avrdude
      octoprint
#      prusa-slicer
      #Hacking tools

    #  thunderbird
    ];
  };

  # Allow unfree packages
  nixpkgs.config.allowUnfree = true;

  #Bug fix when upgrading
  nix.package = pkgs.nixVersions.latest;

  hardware.sane.enable = true; # enables support for SANE scanners

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
  #  vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
  #  wget
  ];

 # programs.gpg.agent = {
 #   enable = true;
 #   pinentryPackage = pkgs.pinentry;
 # };

  # Some programs need SUID wrappers, can be configured further or are
  # started in user sessions.
  # programs.mtr.enable = true;
  # programs.gnupg.agent = {
  #   enable = true;
  #   enableSSHSupport = true;
  # };

  # List services that you want to enable:

  # Enable the OpenSSH daemon.
  # services.openssh.enable = true;

  # Open ports in the firewall.
  # networking.firewall.allowedTCPPorts = [ ... ];
  # networking.firewall.allowedUDPPorts = [ ... ];
  # Or disable the firewall altogether.
  # networking.firewall.enable = false;

  # This value determines the NixOS release from which the default
  # settings for stateful data, like file locations and database versions
  # on your system were taken. It‘s perfectly fine and recommended to leave
  # this value at the release version of the first install of this system.
  # Before changing this value read the documentation for this option
  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
  system.stateVersion = "25.05"; # Did you read the comment?

}