Installation

[Bubba-Bubba]

I am running Home Manager & a flake.

flake.nix

 inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    # home-manager, used for managing user configuration
    home-manager = {
      url = "github:nix-community/home-manager/release-23.05";
      inputs.nixpkgs.follows = "nixpkgs";
    };

nixvim = {
    url = "github:nix-community/nixvim";
  #  # If you are not running an unstable channel of nixpkgs, select the corresponding branch of nixvim.
    # url = "github:nix-community/nixvim/nixos-23.05";
    inputs.nixpkgs.follows = "nixpkgs";
  };

helix.url = "github:helix-editor/helix/23.05"; 
  };

outputs = { self, nixpkgs, home-manager, nixvim, ... }@inputs : {
    
    nixosConfigurations = {
      My_Nix = nixpkgs.lib.nixosSystem {
        system = "x86_64-linux";
                  specialArgs = inputs;

         modules = [

          nixvim.homeManagerModules.nixvim
          ./configuration.nix
....

home.nix

{ config, pkgs, ... }:

{

imports = [
 inputs.nixvim.homeManagerModules.nixvim
];
.....

And I am getting the error

error:
       … while checking flake output 'nixosConfigurations'

         at /nix/store/616603zzhk0xqvwx58z43f2kpwz63syg-source/flake.nix:24:5:

           23|
           24|     nixosConfigurations = {
             |     ^
           25|       My_Nix = nixpkgs.lib.nixosSystem {

       … while checking the NixOS configuration 'nixosConfigurations.My_Nix'

         at /nix/store/616603zzhk0xqvwx58z43f2kpwz63syg-source/flake.nix:25:7:

           24|     nixosConfigurations = {
           25|       My_Nix = nixpkgs.lib.nixosSystem {
             |       ^
           26|         system = "x86_64-linux";

       (stack trace truncated; use '--show-trace' to show the full trace)

       error: The option `home' does not exist. Definition values:
       - In `/nix/store/1rp9mgpy83k4w11gi58hqfcqhk3nnahp-source/flake.nix':
           {
             _type = "if";
             condition = false;
             content = {
               packages = [
           ...

[GaetanLepage]

Hey !
The nixvim.homeManagerModules.nixvim module should not be placed in the NixOS imports (like you do in your flake.nix) but in the Home-manager imports:
See this example: https://github.com/GaetanLepage/dotfiles/blob/c92319628d71a15c8e31fe7b6e1a86d7c4c6bda5/flake.nix#L78

[Bubba-Bubba]

Thank you Gaetan....
and yet I have not actually installed nixvim...

[marcus@nixos:/etc/nixos]$ whereis nixvim
nixvim:

[Bubba-Bubba]

Okay Gaetan....I stuck this boilerplate in my home.nix,
and now I can call nvim - I think i am making progress....lol

programs.nixvim = {
    enable = true;

    # Configure neovim options...
    options = {
      relativenumber = true;
      incsearch = true;
    };

    # ...mappings...
    maps.normal = {
      "<C-s>" = ":w<CR>";
      "<esc>" = { action = ":noh<CR>"; silent = true; };
    };

    # ... and plugins
    plugins = {
      telescope.enable = true;
      harpoon = {  # Hi Prime :)
        enable = true;
        keymaps.addFile = "<leader>a";
      };
    };
  };

[GaetanLepage]

Great start !
If you want, you can take a look at my config for inspiration/ways to do things in nixvim.
https://github.com/GaetanLepage/dotfiles/tree/master/home/modules/tui/neovim

Happy hacking !

[Bubba-Bubba]

Thanks...yes, I am really trying to grok your setup, and those of one or two others....as with everything Nix so far, it starts off impenetrable, but once it clicks, it's not so bad at all.....But to have bestowed a fully operational Neovim kit to Nixos....I am very grateful