{
  nixConfig = {
    extra-substituters = [
      "https://nix-community.cachix.org"
    ];
    extra-trusted-public-keys = [
      "nix-community.cachix.org-1:mB9FSh9qf2dCimDSUo8Zy7bkq5CX+/rkCWyvRCYg3Fs="
    ];
  };

  description = "MCP Server Packages for Nix";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
  };

  outputs =
    { self, nixpkgs, ... }:
    let
      supportedSystems = [
        "x86_64-linux"
        "aarch64-linux"
        "x86_64-darwin"
        "aarch64-darwin"
      ];
      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
    in
    {
      overlays.default = import ./overlays/default.nix;
    }
    // {
      packages = forAllSystems (
        system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [ self.overlays.default ];
          };
          mcpPackages = import ./packages { inherit pkgs; };
        in
        mcpPackages // {
          default = pkgs.symlinkJoin {
            name = "mcp-servers";
            paths = builtins.attrValues mcpPackages;
          };
        }
      );

      devShells = forAllSystems (
        system:
        let
          pkgs = import nixpkgs {
            inherit system;
            overlays = [ self.overlays.default ];
          };
          mcpPackages = import ./packages { inherit pkgs; };
        in
        {
          default = pkgs.mkShell {
            packages = builtins.attrValues mcpPackages ++ [ pkgs.mcp-nixos pkgs.git ];
            shellHook = ''
              export SEARXNG_BASE_URL="https://search.bueso.eu"
            '';
          };
        }
      );

      checks.x86_64-linux = builtins.removeAttrs self.packages.x86_64-linux [ "default" ];
    };
}