shell.nix

{ pkgs ? import /home/judson/dev/nixpkgs {} }:
let
  inherit (pkgs) lib stdenv ruby rake bundler bundlerEnv;

  rubyEnv = bundlerEnv {
    pname = "shex";

    ruby = ruby;

    groups = ["default" "test" "development" "debug"];
    gemdir = ./.;
  };
in
  stdenv.mkDerivation {
    name = "shex-shell";
    nativeBuildInputs = [ rubyEnv.basicEnv rake ];
  }