Building ghc on Windows with msys2

[cg]

On 10/1/2014 6:25 AM, Simon Peyton Jones wrote:
>
> ·[...]   The important thing is that it
> should be reproducible, and not dependent on the particular Cygwin or
> gcc or whatever the that user happens to have installed.
>

Exactly. So how about setting up a build server using msys2?

I guess the current two build server are all Cygwin based, they are
failing at the same permission issue at early building stage, it prevents
checking out the real problem. It seems msys2 (or msys)  seldom has
such issue.

Best Regards
cg