flake.nix

{
  description = "Hermes Rust development environment";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
    rust-overlay.url = "github:oxalica/rust-overlay";
  };
  outputs = 
  { self, 
    nixpkgs, 
    flake-utils,
    rust-overlay
  }: 
  flake-utils.lib.eachDefaultSystem (system:
    let
      pkgs = import nixpkgs {
        inherit system;
        overlays = [ rust-overlay.overlays.default ];
      };

      rustToolchain = pkgs.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
    in
    {
      devShells.default = pkgs.mkShell {
        nativeBuildInputs = [
          rustToolchain
        ];
      };
  });  
}