new_contents: """cx_Freeze extension
  
  Extends the 'build' command with the 'exe-command' option to allow using a
  different command from 'build_exe' to build executables from Python scripts.
  """
  
  import sys
  import distutils.command.build
  from cx_Freeze.dist import build as cx_build
  from cx_Freeze.dist import setup as cx_setup
  from cx_Freeze.dist import _AddCommandClass
  
  
  class build(cx_build):
  
      cx_build.user_options.append(
          ('exe-command=', None, "Python script executables command"))
  
      def initialize_options(self):
          cx_build.initialize_options(self)
          self.exe_command = 'build_exe'
  
      def get_sub_commands(self):
          subCommands = distutils.command.build.build.get_sub_commands(self)
          if self.distribution.executables:
              subCommands.append(self.exe_command)
          return subCommands
  
  
  # Override cx_Freeze setup to override build command.
  def setup(**attrs):
      commandClasses = attrs.setdefault("cmdclass", {})
      _AddCommandClass(commandClasses, "build", build)
      cx_setup(**attrs)
  
subject: Extend cx_Freeze build class with the exe-command option to allow using a different command from build_exe to build executables from Python scripts