How to remove/replace packages?

[Hisui02]

I've been trying to change the VSCode package, I want to install VSCodium using home-manager, but does not matter how I try to install it I get a package error.
I would like to be able to filter out some packages that I won't be using / I want to install using home-manager to being able to configure them.
Is there a proper way to do this?

[richen604]

can i see the package error and your addition of packages? im assuming its a conflict error
im working on a proper separation of packages in a module system
this is so that users can disable packages/modules and have a reference to better rewrite and customize

but for now it may be possible with overlays, if this works let me know because this would be good for the FAQ

# nixpkgs is a nixModules level option
nixpkgs.overlays = [
  (final: prev: {
    vscode = null;
    # to override version possible too, but this can mess up hydenix
    vscode = userPkgs.vscode;
  })
];

nixpkgs and pkgs targets hydenix packages. you also have userPkgs that you can use to pull in any nixpkgs version you want

[Hisui02]

Sorry I never got a notification about your response and completely forgot about this. Here you have the error message:

error: builder for '/nix/store/6v4d8b6kh1ha049i3f7w31yqxrdw709l-home-manager-path.drv' failed with exit code 25;
       last 1 log lines:
       > error: collision between `/nix/store/l14pz63kf36l55sxllks7xssf9bd147g-vscodium-1.96.2.24355/lib/vscode/v8_context_snapshot.bin' and `/nix/store/42xlycva7frj5rh2vl56b1ry0mjfndcq-vscode-1.96.2/lib/vscode/v8_context_snapshot.bin'

I have tried your approach but I'm not being able to make it work, sending my packages.nix, this file get imported inside nixModules:

{pkgs, nixpkgs, userPkgs, ...}:
{
    # nixpkgs is a nixModules level option
      nixpkgs.overlays = [
        (final: prev: {
          vscode = null;
          # to override version possible too, but this can mess up hydenix
          # vscode = userPkgs.vscode;
        })
      ];

    environment.systemPackages = with pkgs; [
        # Apps
        obsidian # Notes
        vlc # Video player

        # Dev
        ollama

        # Shell
        bat
        btop

        # Others
    ];
}

Setting vscode to null gives this error:

       error: A definition for option `home-manager.users.hisui.programs.vscode.package' is not of type `package'. Definition values:
       - In `/nix/store/xc9h1ygabb9q0w4y49ldqyp0ncvk9nln-source/modules/programs/vscode.nix': null

Trying to override it another one:

       error: expected a set but found null: null

I completely have no clue about how overlays work on NixOS, I'm sorry this might be really simple and i'm bothering you.

[richen604]

nah this was a hack. try setting programs.vscode.package to vscodium in home manager

https://github.com/richen604/hydenix/blob/main/hydenix%2Fprograms%2Fvscode.nix

[Hisui02]

That is was I started trying but I got collision error (the first one I showed on latest reply). It seems that vscode is already installed nixos wide so managing it via home-manager is not posible without previously removing it?
Was my first thought but couldn't find more info.

[richen604]

looks like this is an open issue NixOS/nixpkgs#342052
i was hoping this could be solved with overlays, theoretically

something like this? this would also solve the home-manager module for vscode

 nixpkgs.overlays = [
    (final: prev: {
      vscode = final.vscodium;
    })
  ];

[Hisui02]

It works! I could replace VSCode succesfully, but setting it to null (to "uninstall" a package) does not work, I've been testing some workarounds but I got nothing. Is there a proper way to handle this?