text: import os
  import platform
  
  
  def add_implementation_envs(env, _app):
      # Add requirements to HIERO_PLUGIN_PATH
      pype_root = os.environ["OPENPYPE_REPOS_ROOT"]
      new_hiero_paths = [
          os.path.join(pype_root, "openpype", "hosts", "hiero", "api", "startup")
      ]
      old_hiero_path = env.get("HIERO_PLUGIN_PATH") or ""
      for path in old_hiero_path.split(os.pathsep):
          if not path:
              continue
  
          norm_path = os.path.normpath(path)
          if norm_path not in new_hiero_paths:
              new_hiero_paths.append(norm_path)
  
      env["HIERO_PLUGIN_PATH"] = os.pathsep.join(new_hiero_paths)
      env.pop("QT_AUTO_SCREEN_SCALE_FACTOR", None)
  
      # Try to add QuickTime to PATH
      quick_time_path = "C:/Program Files (x86)/QuickTime/QTSystem"
      if platform.system() == "windows" and os.path.exists(quick_time_path):
          path_value = env.get("PATH") or ""
          path_paths = [
              path
              for path in path_value.split(os.pathsep)
              if path
          ]
          path_paths.append(quick_time_path)
          env["PATH"] = os.pathsep.join(path_paths)
  
      # Set default values if are not already set via settings
      defaults = {
          "LOGLEVEL": "DEBUG"
      }
      for key, value in defaults.items():
          if not env.get(key):
              env[key] = value
  