Automating Windows setup for development

Simon Marlow marlowsd at
Tue Apr 22 14:08:06 UTC 2014

This reminds me: the instructions shouldn't be recommending that people 
add GHC's own mingw tools to their PATH.  The build should work without 
that, and indeed we want to know if the build is using gcc from PATH 
because that's a bug (and could cause real problems).


On 22/04/2014 02:12, Austin Seipp wrote:
> This is really cool, thanks!
> If you wouldn't mind, perhaps that page should be updated (the MSYS2
> page) to point to your Powershell script. That would be really useful
> and make it much easier to find for people who don't follow the
> mailing list.
> On Mon, Apr 21, 2014 at 8:03 PM, Niklas Larsson <metaniklas at> wrote:
>> Hi!
>> I have made a Powershell script that sets up a GHC build environment on
>> Windows from scratch. It's at It largely
>> follows the instructions at
>> It
>> has no dependencies aside from Powershell 3.0.
>> The reason I made it was to make it easier to set up a build bot on a clean
>> machine. But it's probably generally useful for people who want to develop
>> GHC on Windows.
>> Usage:
>> - Put the script in an empty directory
>> - Run it
>> - Hope for the best
>> Potential problems:
>> - If Python 2.7 is already installed and not on the path, the script wont
>> install it, and msys wont pick up the path. Solution: Add the path to python
>> in the control panel.
>> - Powershell wont run unsigned scripts by default. The error message will
>> give a hint how to disable that. I will add a signed version as soon as I
>> can figure out how.
>> Niklas
>> _______________________________________________
>> ghc-devs mailing list
>> ghc-devs at

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