How to display what group/option an installed package belongs to?

[BoredSquirrel]

How to remove packages installed with some core module?

I have a minimal KDE Plasma system installed, and want to remove some “preinstalled” ones. This works for packages installed with KDE Plasma: environment.plasma6.excludePackages = with pkgs.kdePackages; [ oxygen elisa xwaylandvideobridge ]; I want to remove the packages orca restic and sudo (using sudo-rs). How can I do that? Do I need to find the module these packages are installed with, or is there a global option?

I want to check what group/option installs restic to my system, as it is installed by default for some reason.

[waffle8946]

nixos-option environment.systemPackages should work, if it’s added to your system package list.

[BoredSquirrel]

Getting issues

error: file 'nixpkgs/nixos' was not found in the Nix search path (add it using $NIX_PATH or -I)

How can I fix this?

[waffle8946]

Do you use flakes for your NixOS config?

[BoredSquirrel]

Yup, here is the flake config. It is very basic, all the rest is in normal nixos configs

Switching from 24.11 to unstable declaratively (without channels)

@tlater I dont use flakes (yet) and tried using channels with no success. So no reason for such annoyed comments. I have read the comment in the config now and it makes sense. I have changed that back to the initial 24.11 and added the unstable channel as per the docs sudo nix-channel --add https://channels.nixos.org/nixos-unstable nixos I realized there was an identical channel called nixos-unstable which I then removed and updated the channels. I try to rebuild my system with the same erro…

[waffle8946]

Use nix eval FLAKEURL#nixosConfigurations.$(hostname).options.environment.systemPackages.definitionsWithLocations (replace FLAKEURL with the location of your flake)

[BoredSquirrel]

Uhm 1. This is a real command? And 2. It spits out a wall of text, there are no linebreaks?

[waffle8946]

@BoredSquirrel

It spits out a wall of text, there are no linebreaks?

You can try piping it through jq or bat or such to make it prettier, e.g. add | nix run nixpkgs#jq to the end.

EDIT: you may also need --json on the nix eval command.