added nix

package.nix

@@ -0,0 +1,29 @@
+{ pkgs, stdenv, expect, openssl, lib, ... }:
+
+stdenv.mkDerivation rec {
+  pname = "nokia-auto-vpn";
+  version = "0.1.0";
+
+  src = ./.;
+
+  nativeBuildInputs = [ expect openssl ];
+
+  # nothing to build; we just install scripts
+  buildPhase = "true";
+
+  installPhase = ''
+    mkdir -p $out/bin
+    # install your run wrapper and expect script (adjust names if different)
+    install -m755 ${./nix.sh} $out/bin/nokia-auto-vpn
+    install -m755 ${./vpn.exp} $out/bin/vpn.exp
+
+  '';
+
+  meta = with lib; {
+    description = "Nokia vpn automation wrapper (expect + bash)";
+    # homepage = "https://github.com/alfonzso/proxy-manager"; # adjust if needed
+    license = licenses.mit; # tweak if needed
+    maintainers = with maintainers; [ alfoldi ];
+  };
+}
+