{
  pkgs,
  lib,
  config,
  inputs,
  ...
}: let
  nsrc = pkgs.fetchFromGitHub {
    owner = "elm-tooling";
    repo = "elm-language-server";
    rev = "0dc4076180fe7e758bed267a84911cc202011a13";
    sha256 = "1xys9a468fy1vxlby8pmvnpv0kg5hr4956mdp2kclvs55k4j9y43";
  };
  elm-lsp =
    lib.overrideDerivation pkgs.elmPackages.elm-language-server
    (drv: {
      src = nsrc;
    });
in {
  # https://devenv.sh/basics/
  env.GREET = "devenv";

  # https://devenv.sh/packages/
  packages = with pkgs; [
    sqlite
    nodePackages.typescript-language-server
    nodePackages.prettier
    elm2nix
    elmPackages.elm
    elmPackages.elm-format
    elmPackages.elm-review
    elmPackages.elm-test-rs
    elmPackages.elm-land
    elm-lsp
    # elmPackages.lamdera  # lol
  ];

  # https://devenv.sh/languages/
  # languages.rust.enable = true;
  languages = {
    # elm.enable = true;
    javascript = {
      enable = true;
      bun.enable = true;
    };
  };

  # https://devenv.sh/processes/
  # processes.cargo-watch.exec = "cargo-watch";

  # https://devenv.sh/services/
  # services.postgres.enable = true;

  # https://devenv.sh/scripts/
  scripts.hello.exec = ''
    echo hello from $GREET
  '';

  enterShell = ''
    hello
    git --version
  '';

  # https://devenv.sh/tasks/
  # tasks = {
  #   "myproj:setup".exec = "mytool build";
  #   "devenv:enterShell".after = [ "myproj:setup" ];
  # };

  # https://devenv.sh/tests/
  enterTest = ''
    echo "Running tests"
    git --version | grep --color=auto "${pkgs.git.version}"
  '';

  # https://devenv.sh/pre-commit-hooks/
  # pre-commit.hooks.shellcheck.enable = true;

  # See full reference at https://devenv.sh/reference/options/
}