[HELP] Assistance with nixd configuration in nixvim

[fjtluz]

I've decided to learn to use nix to help me configure my configurations. I am using home-manager with flakes; also I am on Fedora on a single-user installation of nix. I am familiar vim and nvim, but I've only ever used them with coc and wanted to try configuring the lsp's directly through nix.
As a first step config in my nix file, I should install nixvim and configure the lsp for nixd, as to facilitate my configuration. And second, I should configure cmd to give me basic completions.
But I don't seem to be able to get nixd to run for home-manager and nixvim. For nixpkgs it gives suggestions just fine, but for the others I am left in the dark.

I apologize for opening an issue just for helo, and if there's a better community forum for this types of questions, I'll gladly move there.
I've gone through a bit of the issues and tried the solutions posed on #2290, but they weren't able to solve my problem.

Here is my base flake.nix:

{
  description = "Home Manager configuration of fjtluz";

# nixpkgs, home-manager and flake-parts are imported by default
  inputs = {
    nixvim.url = "github:nix-community/nixvim";
  };
  outputs = inputs@{
    flake-parts,
      home-manager,
      nixpkgs,
      ...
  }:
  flake-parts.lib.mkFlake { inherit inputs; } {
    imports = [
      inputs.home-manager.flakeModules.home-manager
    ];
    systems = [
      "x86_64-linux"
    ];
    flake = {
      homeModules.home = { pkgs, ... }: {
        home.username = "fjtluz";
        home.homeDirectory = "/home/fjtluz";
        home.stateVersion = "25.11";
        home.packages = with pkgs; [
          nixd
            nixfmt
        ];
        programs.home-manager.enable = true;
        nix.nixPath = [ "nixpkgs=${inputs.nixpkgs}" ];
      };
      homeModules.nixvim = 
      {
        imports = [ 
          inputs.nixvim.homeModules.nixvim
        ];
        programs.nixvim = {
          enable = true;
          imports = [
            ./nixvim
          ];
        };
      };
      homeConfigurations.fjtluz = home-manager.lib.homeManagerConfiguration {
        pkgs = import nixpkgs { system = "x86_64-linux"; };
        modules = [
          inputs.self.homeModules.home
            inputs.self.homeModules.nixvim
        ];
      };
    };
  };
}

And here is the default.nix inside ./nixvim:

{
  config = {
    colorschemes.everforest = {
      enable = true;
      settings = {
        colors_override = {
          bg0 = [ "#1C1C1C" "235" ];
        };
      };
    };

    opts = {
      tabstop = 2;
      shiftwidth = 2;
      expandtab = true;
      softtabstop = 2;
    };

    viAlias = true;
    vimAlias = true;

    plugins.lsp = {
      enable = true;
      servers.nixd = {
        enable = true;
        settings = 
        let
          flake = "(builtins.getFlake \"/home/fjtluz/.config/home-manager/\")";
          home-manager-options = "${flake}.homeConfigurations.fjtluz.options";
        in
        {
            nixpkgs = { expr = "import <nixpkgs> { }"; };
            formatting = { command = "nixfmt"; };
            options = {
              flake-parts = "${flake}.debug.options";
              home-manager = "${home-manager-options}";
              nixvim = "${home-manager-options}.programs.nixvim.type.getSubOptions [ ]";
            };
        };
      };
    };

    lsp = {

      keymaps = [ 
      { key = "gd"; lspBufAction = "definition"; } 
      ];
    };

    plugins = {
      cmp = {
        enable = true;
        autoEnableSources = true;
        settings.sources = [
        { name = "nvim_lsp"; }
        ];
      };
    };
  };
}

As I mentioned above, I receive suggestions for nixpkgs just fine:

But for programs, the suggestions seem really random and don't really reflect programs I would be able to install (e.g. fish, kitty)

And for programs.nixvim, simply nothing at all: