{
  pkgs,
  hostName ? null,
}:
let
  packages = builtins.attrValues {
    inherit (pkgs)
      nixfmt-rfc-style
      cachix
      nixd
      deadnix
      statix
      mcp-nixos
      ;
  };
in
{
  inherit packages;
  devShell = pkgs.mkShell {
    inherit packages;
    name = "nix-dev-shell";
    shellHook = ''
      echo "❄️  Nix dev environment"
    '';
  };
  shellAliases = {
    nixformat = ''
      deadnix -e && \
      nix run nixpkgs#nixfmt-tree && \
      statix fix
    '';
  }
  // (
    if hostName == null then
      { }
    else
      {
        nix-push-cache = ''
          nix build $NH_FLAKE#nixosConfigurations.${hostName}.config.system.build.toplevel \
          --print-out-paths --fallback --max-jobs 100 --cores 0 |
          nix run nixpkgs#attic-client -- push lan:nixos --stdin
        '';
      }
  );
}