{
  description = "Effigenix ERP – Dev Environment";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    rust-overlay = {
      url = "github:oxalica/rust-overlay";
      inputs.nixpkgs.follows = "nixpkgs";
    };
  };

  outputs = { nixpkgs, flake-utils, rust-overlay, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        pkgs = import nixpkgs { inherit system overlays; };

        rustToolchain = pkgs.rust-bin.stable.latest.default.override {
          extensions = [ "rust-src" "rust-analyzer" ];
          targets = [
            "aarch64-linux-android"
            "armv7-linux-androideabi"
            "i686-linux-android"
            "x86_64-linux-android"
          ];
        };
      in
      {
        devShells.default = pkgs.mkShell {
          name = "effigenix";

          buildInputs = with pkgs; [
            # ─── Frontend ───────────────────────────
            nodejs_22
            nodePackages.pnpm

            # ─── Rust / Tauri ───────────────────────
            rustToolchain
            cargo-tauri

            # Tauri v2 system deps (Linux/GTK)
            pkg-config
            openssl
            gtk3
            webkitgtk_4_1
            libsoup_3
            glib
            gdk-pixbuf
            cairo
            pango
            harfbuzz
            atk

            # ─── Tools ─────────────────────────────
            just
            jq
            curl
            postgresql
            rainfrog
          ];

          # Tauri braucht diese zur Laufzeit
          LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath (with pkgs; [
            gtk3
            webkitgtk_4_1
            libsoup_3
            openssl
          ]);

          shellHook = ''
            echo "Node    $(node --version)"
            echo "pnpm    $(pnpm --version)"
            echo "rustc   $(rustc --version)"
            echo "cargo   $(cargo --version)"
            echo ""
            echo "just --list  für alle Befehle"
          '';
        };
      });
}