[Solved] Update to plasma6 when using flakes is not working

Hi There,

I guess it is a simple thing I am overseeing, but I can’t get to move my plasma5 config to plasma6. I am rather new to NixOS, so I guess it’s a general issue I have, as I couldn’t find a similar topic.

I am using flakes with the unstable-channel, but there seems to be something missing.

When moving to plasma6 by removing the entry for plasma5 and adding:

services.desktopManager.plasma6.enable = true;

I get:

error: The option `services.desktopManager' does not exist. Definition values:
       - In `/nix/store/206zkfb25v438zyxnvfy11i2m8674vn0-source/machines/forbook/configuration.nix':
           {
             plasma6 = {
               enable = true;
             };
           }

Can someone give me a hint, what to change?

My flake-nix part at the beginning:

{
  description = "NixOS configuration";

  inputs = {
    #nixpkgs-stable.url = "github:nixos/nixpkgs/nixos-23.11";
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    nixos-hardware.url = "github:NixOS/nixos-hardware/master";
    # home-manager, used for managing user configuration
    home-manager = {
      url = "github:nix-community/home-manager";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    plasma-manager = {
      url = "github:pjones/plasma-manager";
      inputs.nixpkgs.follows = "nixpkgs";
      inputs.home-manager.follows = "home-manager";
    };

  };

  outputs = inputs@{ nixpkgs, home-manager, plasma-manager, nixos-hardware, ... }: {
    nixosConfigurations = {
      forbook = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
        modules = [
          ./machines/forbook/configuration.nix
          nixos-hardware.nixosModules.lenovo-thinkpad-t480
          # make home-manager as a module of nixos
          # so that home-manager configuration will be deployed automatically when executing `nixos-rebuild switch`
          home-manager.nixosModules.home-manager
          {
            home-manager.useGlobalPkgs = true;
            home-manager.useUserPackages = true;
            home-manager.users.forspeed = import ./home/home.nix;
	        # home-manager.sharedModules = [ plasma-manager.homeManagerModules.plasma-manager ];

            # Optionally, use home-manager.extraSpecialArgs to pass arguments to home.nix
          }
        ];
      };

and the configuration.nix:

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

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

  # Bootloader.
  boot.loader.systemd-boot.enable = true;
  boot.loader.efi.canTouchEfiVariables = true;
  boot.extraModulePackages = with config.boot.kernelPackages; [
    acpi_call
  ];

  nixpkgs = {
    config = {
      allowUnfree = true;
    };
  };

# Enable the Flakes feature and the accompanying new nix command-line tool
  nix.settings = {
    experimental-features = "nix-command" "flakes";
    auto-optimise-store = true;
  };



  networking.hostName = "forbook"; # Define your hostname.
  networking.domain = "localdomain";
  # 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;

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


  # Set your time zone.
  time.timeZone = "Europe/Berlin";

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

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

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

  # Enable the KDE Plasma Desktop Environment.
#  services.xserver.displayManager.sddm.enable = true;
#  services.xserver.desktopManager.plasma6.enable = true;
  services.desktopManager.plasma6.enable = true;
  services.xserver.displayManager.sddm.wayland.enable = true;
  # Configure keymap in X11
  services.xserver.xkb = {
    layout = "de";
    variant = "";
  };

  # Configure console keymap
  console.keyMap = "de";

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

  # Enable sound with pipewire.
  sound.enable = true;
  hardware.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;

  

 

  # List packages installed in system profile. To search, run:
  # $ nix search wget
  environment.systemPackages = with pkgs; [
    curl
    git
    vim
    wget
    joe
  ];

  # 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 = [ 22 ];
  networking.firewall.allowedUDPPorts = [ 22 ];
  # 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 = "23.11"; # Did you read the comment?

}

Hello,

Your configuration seems fine to me.
Have you tried to update the nixpkgs locked version ?
nix flake lock --update-input nixpkgs

The error says

error: The option `services.desktopManager' does not exist.

Your config should read

services.xserver.desktopManager

There’s also a recent guide: Enable Plasma 6 that might help you.

Hi,
yes, I tried that also - did not work as well.
@nurelin: Thanks - that did the trick!

Topic solved!

Thanks,
Florian

1 Like

By the way:

services.xserver.desktopManager.plasma6.enable got renamed into
services.desktopManager.plasma6.enable

Wasn’t aware of that. Thanks for the info, @ShalokShalom !

1 Like

Btw, nix flake lock --update-input is marked as deprecated in the Nix Reference Manual: use nix flake update instead.

2 Likes

NixOS is not yet on a Nix version that has that change as far as I know, so you may still need to use nix flake lock --update-input for now.

2 Likes