[arch-haskell] Further to the discussion in pull request for yi

[Magnus Therning]

I've had a think about this, and started hacking up a bit of a
solution in archlinux, changes to cabal2arch will follow.  You can see
what I'm doing in my 'patching' branch[1].  Please take a look and
comment.

/M

[1]: https://github.com/magthe/archlinux/commits/patching

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Magnus Therning                      OpenPGP: 0xAB4DFBA4
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