On 2015-02-17 at 13:47:50 +0100, Takenobu Tani wrote:
> I modified System/Process/Internals.hs locally and build on MinGW 32bit.
> Then I was successful to build on 32bit Windows 7.
>
> Shall I write a bug report on trac or any? or ghc7.10.1.rc2 will not
> support 32 bit Windows?

Please file a pull-request at https://github.com/haskell/process

I'm somewhat surprised this wasn't noticed before(?)