Hi,
I’ve been working on a NixOS module to implement declarative configuration for FireHol (https://firehol.org/) here: GitHub - TinHead/nixos-firehol: Firehol module for declarative NixOS firewall
Importing it directly in my configuration.nix works fine having the module locally available as below:
{
imports = [
./firehol/firhol.nix
];
#----snip---
services = {
firehol = {
enable = true;
# declarative config below ....
};
};
};
My trouble started when I have tried doing the same using flakes.
Below is my flake.nix for the module (no I have no idea what I’m doing here 
):
{
description = "firehole-nixos flake";
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
};
outputs = { self, nixpkgs, ... }:
{
nixosModules = {
nixos-firehol = import ./nixos-firehol.nix ;
};
nixosModule = self.nixosModules.nixos-firehol; # export single module
};
}
And my configuration flake:
{
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
sops-nix.url = github:Mic92/sops-nix;
firehol-nixos.url = github:TinHead/nixos-firehol;
};
outputs = { nixpkgs, firehol-nixos, sops-nix, ... }: {
colmena = {
meta = {
nixpkgs = import nixpkgs {
system = "x86_64-linux";
};
};
# Also see the non-Flakes hive.nix example above.
myFirewallHost =[ ./firewall/configuration.nix sops-nix.nixosModules.sops];
};
};
}
And in ./firewall/configuration.nix:
{ config, pkgs, lib, firehol-nixos , ... }:
# the usual config boot, network etc .... and finally services
services = {
firehol = {
enable = true;
# configuration below ...
};
};
Building the above yells:
error: The option `services.firehol' does not exist. Definition values:
- In `/nix/store/...../configuration.nix':
{
enable = true;
interfaces = {
esswg = {
myname = "vpn";
...
(use '--show-trace' to show detailed location information)
[ERROR] -----
[ERROR] Operation failed with error: Child process exited with error code: 1
So finally the question: What is the proper way to expose a module trough a flake?
Cheers,
Razvan
