This subclass of Module::Build provides some handy methods to assist the _Build.PL_ script of XS-based module distributions that make use of platform libraries managed by _pkg-config_. As well as supporting libraries installed on a platform-wide basis and thus visible to _pkg-config_ itself, this subclass also assists with 'Alien::'-based wrappers of these system libraries, allowing them to be dynamically installed at build time if the platform does not provide them.