{
  description = "grimmauld-nixos";

  inputs = {
    nixpkgs = {
      url = "github:NixOS/nixpkgs/nixos-unstable";
      # url = "git+file:///home/grimmauld/coding/nixpkgs";
    };
    chaotic = {
      url = "github:chaotic-cx/nyx/nyxpkgs-unstable";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    agenix = {
      url = "github:ryantm/agenix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nixos-mailserver = {
      url = "gitlab:simple-nixos-mailserver/nixos-mailserver/master";
      inputs.nixpkgs.follows = "nixpkgs";
    };
    nixos-matrix-modules  = {
      url = "github:dali99/nixos-matrix-modules";
      inputs.nixpkgs.follows = "nixpkgs";
    };
#    ranger_udisk_menu.url = "git+https://git.grimmauld.de/Grimmauld/ranger_udisk_menu";
#    glibc-eac.url = "github:Frogging-Family/glibc-eac";
    aagl-gtk-on-nix = {
      url = "github:ezKEa/aagl-gtk-on-nix";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = inputs @ { self, agenix, nixpkgs, chaotic, aagl-gtk-on-nix, nixos-mailserver, nixos-matrix-modules, ... }:
    let
      patches = [
        ./aa_mod.patch
      ];

      customNixosSystem = system: definitions:
        let
          unpatched = nixpkgs.legacyPackages.${system};
          patched = unpatched.applyPatches {
            name = "nixpkgs-patched";
            src = inputs.nixpkgs;
            patches =  map (p: if (builtins.isPath p) then p else (unpatched.fetchpatch p)) patches;
          };
          nixosSystem = import (patched + "/nixos/lib/eval-config.nix");
        in
        nixosSystem ({
          inherit system;
          specialArgs = { inherit inputs system; };
        } // definitions);
    in
    {
      nixosConfigurations = {
        grimmauld-nixos = customNixosSystem "x86_64-linux" {
          modules = [
            agenix.nixosModules.default
            chaotic.nixosModules.default
            aagl-gtk-on-nix.nixosModules.default
            ./configuration.nix
            
            ./specific/grimm-nixos-laptop/configuration.nix
          ];
        };
        grimm-nixos-ssd = customNixosSystem "x86_64-linux" {
          modules = [
            agenix.nixosModules.default
            chaotic.nixosModules.default
            aagl-gtk-on-nix.nixosModules.default
            ./configuration.nix
            
            ./specific/grimm-nixos-ssd/configuration.nix
          ];
        };
        grimmauld-nixos-server = customNixosSystem "x86_64-linux" {
          modules = [
            agenix.nixosModules.default
            nixos-matrix-modules.nixosModules.default
            nixos-mailserver.nixosModules.default
            
            ./configuration.nix

            ./specific/grimmauld-nixos-server/configuration.nix
            ./modules     
          ];
        };
      };
    };
}