flake.nix

{
  description = "A Nix-flake-based Rust development environment";

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

  outputs = { self, nixpkgs, rust-overlay, utils }:
    utils.lib.eachDefaultSystem (system:
      let
        overlays = [ rust-overlay.overlays.default ];
        pkgs = import nixpkgs {
          inherit system overlays;
        };
      in
      with pkgs;
      {
        devShells.default = mkShell rec {
          buildInputs = with pkgs; [
            (rust-bin.selectLatestNightlyWith (toolchain: toolchain.default))
            cargo-nextest
            cargo-rdme
            just
          ];
        };
      }
    );
}