{
  self,
  lib,
  inputs,
  ...
}:

let
  mkNixosModule = name: [{ ${name} = import ./${name}; }];
  mkBaseImport = name: [ self.nixosModules.${name} ];

  # create a list of directory names from given folder
  filterModules = dir: builtins.attrNames (lib.attrsets.filterAttrs (n: v: v == "directory") (builtins.readDir dir));

  # create nixosModules imports from list
  flakeNixosModulesList = modules: lib.attrsets.mergeAttrsList (builtins.concatMap mkNixosModule modules);
  flakeNixosBaseImports = modules: lib.lists.flatten (builtins.concatMap mkBaseImport modules);
in
{
  # Configuration common to all Linux systems
  flake = {
    nixosModules = rec {} //
      (flakeNixosModulesList (filterModules ./.)) //
      {
        base.imports = [
          self.nixosModules.home-manager
          inputs.agenix.nixosModules.default
          inputs.musnix.nixosModules.musnix

          ({
            flake,
            pkgs,
            lib,
            unstable,
            master,
            ...
          }: {
            nixpkgs.overlays = (import ../overlays) ++ [
              (prev: next: {
                scan2paperless = inputs.scan2paperless.legacyPackages.${prev.system}.scan2paperless;
                nixd = inputs.unstable.legacyPackages.${prev.system}.nixd;

                factorio-headless = inputs.master.legacyPackages.${prev.system}.factorio-headless;
                paperless-ngx = inputs.master.legacyPackages.${prev.system}.paperless-ngx;
                waybar = inputs.master.legacyPackages.${prev.system}.waybar;
                element-desktop = inputs.master.legacyPackages.${prev.system}.element-desktop;

                adlist = inputs.adblock-unbound.packages.${prev.system};
              })
            ];

            nix.nixPath = [
              "nixpkgs=${inputs.nixpkgs}"
              "nixos-config=${../lib/compat/nixos}"
              "home-manager=${inputs.home-manager}"
            ];
          })
        ] ++ (flakeNixosBaseImports (filterModules ./.));
    };
  };
}