# phpman > man > ExtUtils::MY(3pm)

## NAME
    [ExtUtils::MY](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMY/markdown) - [ExtUtils::MakeMaker](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMakeMaker/markdown) subclass for customization

## SYNOPSIS
      # in your Makefile.PL
      sub [MY::whatever](https://www.chedong.com/phpMan.php/perldoc/MY%3A%3Awhatever/markdown) {
          ...
      }

## DESCRIPTION
    FOR INTERNAL USE ONLY

    [ExtUtils::MY](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMY/markdown) is a subclass of [ExtUtils::MM](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMM/markdown). Its provided in your Makefile.PL for you to add and
    override MakeMaker functionality.

    It also provides a convenient alias via the MY class.

    [ExtUtils::MY](https://www.chedong.com/phpMan.php/perldoc/ExtUtils%3A%3AMY/markdown) might turn out to be a temporary solution, but MY won't go away.