On 14-01-05 04:58 PM, Josef Svenningsson wrote:
> Hi,
>
> I did some investigation and it seems that mmorph has gotten the
> dependency constraints wrong for the transformers package. I've fixed
> the constraint and submitted a pull request to the mmorph repository.
> Hopefully it should be incorporated soon
>
> https://github.com/Gabriel439/Haskell-MMorph-Library/pull/9
>
> But right now you can try 'cabal install pandoc
> --constraint=transformers==0.3.0.0' which forces the right version of
> the transformers package. If you're lucky that's all that is needed.
>
> HTH
>
> Josef

  This is fantastic.  Your solution is not working for me yet but it
gives me hope.  (I've managed to f*** my current pandoc installation by
nuking my .ghc/.cabal tree -- note to self, MOVE TO BACKUP LOCATION
rather than deleting!!!, so I'm now getting a little desperate ...)

  Ben Bolker

>
>
>
> On Sun, Jan 5, 2014 at 9:39 PM, Ben Bolker <bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
> <mailto:bbolker-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>> wrote:
>
>     On 14-01-05 02:59 PM, John MacFarlane wrote:
>     > +++ Ben Bolker [Jan 04 14 21:37 ]:
>     >> On 14-01-04 08:09 PM, John MacFarlane wrote:
>     >>> Odd, it's trying to downgrade the version of transformers
>     >>> that mmorph depends on.  I'm not sure why.  It could be that
>     >>> one of the other packages it needs to install is incompatible
>     >>> with the latest transformers (though I don't think that's the
>     >>> case).  Or maybe one of the other pandoc dependencies that you
>     >>> compiled earlier is linked against transformers-0.2.2.0.
>     >>>
>     >>> Have you tried doing a 'cabal clean' before 'cabal install
>     --reinstall'?
>     >>
>     >>   If I just do a plain "cabal clean" in an arbitrary directory
>     (e.g. my
>     >> home directory) I get "cabal: No cabal file found ..."
>     >
>     > Oh, I thought you were installing from the pandoc source directory,
>     > not doing "cabal install pandoc."  So, never mind about the 'clean'.
>     >
>     >> I tried purging everything and starting over --
>     >>
>     >>
>     http://stackoverflow.com/questions/12048352/my-cabal-packages-are-fubar-how-can-i-purge-them-and-start-over
>     >>
>     >> https://gist.github.com/simonmichael/1185421
>     >>
>     >>  but still no luck (reports that mmorph-1.0.1 failed to install: the
>     >> precise error messages are too far back in my console history to
>     see.  I
>     >> *could* run it all again and save the error log if anyone thought it
>     >> would be useful ...)
>     >
>     > This is really strange.  I had no trouble on my debian box.  Go ahead
>     > and send the full error log, maybe that will help.
>
>       I purged, did 'cabal update', and then 'cabal install pandoc'.  Output
>     is posted at
>     http://ms.mcmaster.ca/~bolker/misc/pandoc_install_out.txt .
>
>      Thank you for all help ...
>
>       Ben Bolker
>
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