Polkit not working for kate and kwrite

[BoredSquirrel]

I have setup a minimal KDE Plasma Setup, these are the snippets from my config files

# KDE Plasma 6 and SDDM
    services.displayManager.sddm.enable = true ;
    services.desktopManager.plasma6.enable = true ;

    # KDE Plasma in Wayland
    services.displayManager.defaultSession = "plasma" ;

    # SDDM in Wayland
    services.displayManager.sddm.wayland.enable = true ;

    # KDE Plasma
    environment.plasma6.excludePackages = with pkgs.kdePackages; [
    oxygen
    elisa
    xwaylandvideobridge
    ];
        
    environment.systemPackages = with pkgs; [
 	kate
	kdePackages.polkit-kde-agent-1
	kdePackages.polkit-qt-1
	kdePackages.ktexteditor
    ];

    security.polkit.enable = true;

Rebuilt my system but still, I cannot save config files from kate, no dialog is showing up, it just gives a permission error.

Edit configuration.nix using Kate

Hi! newbie #65536 here, I want to use Kate to edit my NixOS config, but I’m unable to do so because ktexteditor seems to be “incomplete”? Normally in other distros it’d ask for my password when saving the file if it doesn’t have permissions to do so. That does not happen here though, a really generic error pops up and prints the following into the terminal (after enabling some QDebug flags) kf.auth: Encountered error while checking action status, error code: PolkitQt1::Authority::E_CheckFailed…

These solutions seem outdated and did not solve the issue.

[bme]

Edit configuration.nix using Kate

are you using kate instead of kdePackages.kate in your config? that’s what I saw from your post but I want to know if you changed it later. those are (still) not the same, the ones under kdePackages are qt6 while the bare packages are qt5

This seems right, given on unstable:

~/.config/home-manager master +2 !4 ?2                                                            
❯ nix repl --file '<nixpkgs>'
Nix 2.24.14
Type :? for help.
Loading installable ''...
Added 23019 variables.
nix-repl> sources = import ./npins 

nix-repl> unstable = import sources.unstable {}                                 

nix-repl> :b unstable.kate
error:
       … while calling the 'throw' builtin
         at /nix/store/md1n4rwfkvn5wwxyrd2d1a7yf52f1yms-source/pkgs/top-level/aliases.nix:198:5:
          197|     name:
          198|     throw ''
             |     ^
          199|       The top-level ${name} alias has been removed.

       error: The top-level kate alias has been removed.

       Please explicitly use kdePackages.kate for the latest Qt 6-based version,
       or libsForQt5.kate for the deprecated Qt 5 version.

       Note that Qt 5 versions of most KDE software will be removed in NixOS 25.11.

nix-repl> 

[BoredSquirrel]

Wait so it is kdePackages.kate instead of kate? That is the issue?

[bme]

@valsan has a working config, other people on that thread also mention the same thing (use kdePackages.kate) as a fix.

[BoredSquirrel]

Thanks indeed. All I need are these packages and now it works

environment.systemPackages = with pkgs; [
    kdePackages.kate
    kdePackages.ktexteditor
    ];

The rest is already installed

I will try if manually enabling polkit is needed

[BoredSquirrel]

Enabling polkit is also not needed