{
  description = "Pinned Rust dev shell";

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

  outputs = { self, nixpkgs, rust-overlay, ... }:
  let
    systems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
    forAllSystems = f: nixpkgs.lib.genAttrs systems (system:
      let
        pkgs = import nixpkgs {
          inherit system;
          overlays = [ (import rust-overlay) ];
        };
        rustToolchain = pkgs.rust-bin.stable."1.89.0".default.override {
          extensions = [ "rust-src" "rust-analyzer" ];
        };
      in f pkgs rustToolchain
    );
  in {
    devShells = forAllSystems (pkgs: rustToolchain: {
      default = pkgs.mkShell {
        nativeBuildInputs = [
          pkgs.pkg-config
          rustToolchain
          pkgs.lldb
        ];
        buildInputs = [
          pkgs.openssl
        ];
      };
    });
  };
}