code: def BuildInstallerPkg(self, output_file):
      
      self.CreateInstallDirs()
      self.InterpolateFiles()
      self.RenameGRRPyinstallerBinaries()
      self.SignGRRPyinstallerBinaries()
      self.WriteClientConfig()
      self.Set755Permissions()
      self.RunPkgBuild()
      self.RunProductBuild()
      self.RenamePkgToTemplate(output_file)
docs: Builds a package (.pkg) using PackageMaker.