add shell.nix

shell.nix

@@ -0,0 +1,28 @@
+{
+  pkgs ? import (fetchGit {
+    name = "nixos-21.11-2022-05-17";
+    url = "https://github.com/nixos/nixpkgs/";
+    ref = "refs/heads/nixos-21.11";
+    # `git ls-remote https://github.com/nixos/nixpkgs nixos-21.11`
+    rev = "8b3398bc7587ebb79f93dfeea1b8c574d3c6dba1";
+  }) {}
+}:
+
+with pkgs;
+mkShell {
+  buildInputs = [
+    gnumake
+    gcc-arm-embedded
+    dfu-util
+
+    pkg-config
+    libftdi1
+    libusb-compat-0_1
+    hidapi
+
+    (python3.withPackages (python-packages: with python-packages; [
+      pyusb
+      pyserial
+    ]))
+  ];
+}