{
  description = "Rust on STM32";

  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.05";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };

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

      rustToolchain =
        pkgs.rust-bin.stable."1.95.0".default.override {
          extensions = [
            "clippy"
            "llvm-tools-preview"
            "rust-src"
            "rustfmt"
          ];
          targets = [
            "thumbv7m-none-eabi"
            "thumbv6m-none-eabi"
          ];
        };
    in {
      devShells.default = pkgs.mkShell {
        packages = [
          rustToolchain
          pkgs.cargo-binutils
          pkgs.flip-link
          pkgs.just
          pkgs.llvmPackages.bintools
          pkgs.probe-rs
        ];

        RUST_SRC_PATH = "${rustToolchain}/lib/rustlib/src/rust/library";

        shellHook = ''
          echo "Rust on STM32 dev shell"
          echo "Default target: thumbv7m-none-eabi"
          echo "Flash and run commands use PROBE_RS_CHIP if you need to override the default."
        '';
      };
    });
}