Removing system packages

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:wave:t2:so, after digging for quite a while and wrapping my head around the whole concept of nixpkgs modules, I have finally found my answer. The swraid module unconditionally adds the mdadm package to the environment.systemPackages.

I have reported the issue on GitHub, but for the time being I solved it by creating the module replacement:

{ config, lib, ... }:


with lib;


let


  cfg = config.boot.initrd.services.swraid;


in




{
  disabledModules = [ "tasks/swraid.nix" ];


  options.boot.initrd.services.swraid = {
    enable = (mkEnableOption (mdDoc "swraid support using mdadm")) // {
      visible = false; # only has effect when the new stage 1 is in place
    };


    mdadmConf = mkOption {
      description = mdDoc "Contents of {file}`/etc/mdadm.conf` in initrd.";
      type = types.lines;
      default = "";
    };
  };


  config = {
    assertions = [
      {
        assertion = cfg.enable != true;
        message = "swraid is forcefully disabled";
      }
    ];
  };
}

Thanks once again @ryantm for giving me some clues to figure out the right direction!

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