[Haskell-cafe] Some help needed to start Haskell with Yi

Kapil Hari Paranjape kapil at imsc.res.in
Sat Nov 14 20:37:29 EST 2009


On Sat, 14 Nov 2009, Jaco van Iterson wrote:
> Only installation with 'cabal install yi' in a Cygwin shell under MS Windows
> XP ended in:
> Yi\Prelude.hs:182:9:
>     Duplicate instance declarations:
>       instance Category Accessor.T -- Defined at Yi\Prelude.hs:182:9-38
>       instance Category Accessor.T
>         -- Defined in data-accessor-0.2.1:Data.Accessor.Private
> cabal.exe: Error: some packages failed to install:
> yi-0.6.1 failed during the building phase. The exception was:
> exit: ExitFailure 1
> Seems easy to fix but I can't even find where on my drive I can find the
> source code.
> Where is the source?

You need to run 'cabal unpack yi' in a suitable directory. This will
create a subdirectory containing the source. Enter that subdirectory,
make the changes and then run 'cabal install' from that subdirectory.



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