fwiw btw, here's a derivation i'm using that makes a seemingly-usable appium bin (and package-lock.json is the version i generated myself):

{ fetchFromGitHub, buildNpmPackage, yq-go }:
let
  version = "2.4.1";
in buildNpmPackage {
  pname = "appium";
  inherit version;

  src = fetchFromGitHub {
    owner = "NyCodeGHG";
    repo = "appium";
    # rev = "appium@${version}";
    rev = "3531a7c72309b858a4b7a0b7180bfdb645c65cd1";
    hash = "sha256-8RJB5MKL+N1ZbX4TUcnWUyfIdZJiG2EFkdgiQ64yJb0=";
  };

  npmDepsHash = "sha256-ZMeiwUEd2R54v2x0JUGhjU2MHGCRrXDiTYwA3Bk1MxY=";

  nativeBuildInputs = [ yq-go ];

  postPatch = ''
    cp ${./package-lock.json} ./package-lock.json
    yq -iPo json '. +  {"bin": {"appium":"packages/appium/index.js"}}' ./package.json
  '';
}