with import <nixpkgs> {}; {
  env = stdenv.mkDerivation {
    name = "env";
    buildInputs = with pkgs; [
      elmPackages.elm
      nodePackages.nodemon
      sqlite
      cabal-install
      cabal2nix
      tmux
      tmuxinator
    ];
    shellHook = ''
      export PATH=node_modules/.bin:$PATH;
    '';
  };
}