In reply to @accelbread:matrix.org
what do you mean by importing files?

hey, having some trouble getting started with flakelight for my nixos configuration, if someone could point me in the right direction;
my flake.nix:

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-26.05";

    flakelight = {
      url = "github:nix-community/flakelight";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };
  outputs = { flakelight, ...} @ inputs: flakelight ./. {
    inherit inputs;
  };
}

nix/nixos/vm/default.nix:

{
  modules = [
    {
      mystuff.test.enable = true;

      nixpkgs.hostPlatform = "x86_64-linux";
    }
  ];
}

nix/nixosModules/test.nix:

{ lib, config, ... }:
let
  cfg = config.mystuff.test;
in {
  options.mystuff.test = {
    enable = lib.mkOption {
      type = lib.types.bool;
      default = false;
    };
  };

  config = lib.mkIf cfg.enable {
    boot.loader.grub.enable = true;
  };
}

I assumed this should be enough of a minimal example on how to get a module with options working, but I just get this error (i.e. from nix flake show):

error: The option `mystuff' does not exist. Definition values:
       - In `/nix/store/czgkz14jgyp1inif7gv3jf2rr0znmh3k-source/flake.nix':
           {
             test = {
               enable = true;
             };
           }

if I disable the definition of mystuff.test.enable I can see that the module loads just fine, so I'm unsure what's going on:

├───checks                                                                                                                                                                                                                                                                                             
│   ├───aarch64-linux                                                                                                                                                                                                                                                                                  
│   │   └───formatting omitted (use '--all-systems' to show)                                                                                                                                                                                                                                           
│   └───x86_64-linux                                                                                                                                                                                                                                                                                   
│       ├───formatting: derivation 'check-formatting'                                                                                                                                                                                                                                                  
│       └───nixos-vm: derivation 'check-nixos-vm'                                                                                                                                                                                                                                                      
├───formatter                                                                                                                                                                                                                                                                                          
│   ├───aarch64-linux omitted (use '--all-systems' to show)                                                                                                                                                                                                                                            
│   └───x86_64-linux: package 'formatter'                                                                                                                                                                                                                                                              
├───nixosConfigurations                                                                                                                                                                                                                                                                                
│   └───vm: NixOS configuration                                                                                                                                                                                                                                                                        
└───nixosModules                                                                                                                                                                                                                                                                                       
    └───test: NixOS module   

{ outputs, ... }: {
  modules = builtins.attrValues outputs.nixosModules ++ [
    {
      mystuff.test.enable = true;
      nixpkgs.hostPlatform = "x86_64-linux";
    }
  ];
}

for your nixos config would work