[Distutils] backwards compatibility for packaging tools

[Greg Ewing]

zooko wrote:

> So we should focus on documenting and standardizing the metadata that  
> allows code re-use -- the interface between the author of one package  
> and the author of another package -- not the interface between the  
> author of a package and the tool that he uses to build and distribute  
> his own package.

That makes sense to me.

-- 
Greg