msys2 64 bit: help help!

David Macek david.macek.0 at
Mon Jun 27 08:21:16 UTC 2016

On 27. 6. 2016 10:01, Simon Peyton Jones via ghc-devs wrote:
> Friends, esp Tamar,
> I am in happy possession of a new Surface Book, running Windows 10, which is delightful – except that I can’t make the msys64 installation work, which is crucial for GHC.  Can any of you help?
> ·        I install it from here:, which seems to be the canonical place.  The actual 64-bit exe seems to be msys2-x86_64-20160205.exe.
> ·        Installation goes fine
> ·        But when I launch the “MinGW-w54 Win64 shell” from the Start menu, the screen flashes as if it is briefly putting up a window, but then the window disappears.
> ·        Each time I do this the task manager shows that there is another running ‘mintty.exe’.   But it has no visible window
> Does anyone have any idea what I can do or how I can investigate?  I can’t do any GHC development without this!


Please try `C:\msys64\usr\bin\mintty.exe -h always -` (incl. the trailing dash). You can also try `C:\msys64\usr\bin\bash.exe -li` in case the culprit is really mintty.

David Macek

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