{
  description = "A devShell example";

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

  outputs = { self, nixpkgs, rust-overlay, flake-utils, ... }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        overlays = [ (import rust-overlay) ];
        pkgs = import nixpkgs {
          inherit system overlays;
        };
        
      in
      {
        devShells.default = with pkgs; mkShell {
          buildInputs = [
            (rust-bin.selectLatestNightlyWith (toolchain: toolchain.default.override {
              targets = [ "riscv32imac-unknown-none-elf" ];
              extensions = [ "rust-src" "rustfmt" "clippy" "rust-analyzer" ];
            }))
            espflash
            esp-generate
            probe-rs
          ];
        };
      }
    );
}