[Haskell-cafe] Error compiling transformers-base-0.4.1 (debian 64 bits, ghc-7.4.2)

[Sjoerd Visscher]

There's a flag to turn it off, does that work? Try cabal install transformers-base -f-OrphanInstances

Sjoerd

On May 9, 2013, at 2:47 PM, jean-christophe mincke <jeanchristophe.mincke at gmail.com> wrote:

> Hello Café
> 
> I am running into problems  when installing transformers-base-0.4.1.
> 
> Has anyone an idea about what is going on?
> 
> REM : this is a "brand new" debian install, I have just install ghc, cabal install cabal-install etc.
> 
> Thank you
> 
> very much
> 
> J-C
> 
> cabal install transformers-base
> Resolving dependencies...
> Downloading transformers-base-0.4.1...
> Configuring transformers-base-0.4.1...
> Preprocessing library transformers-base-0.4.1...
> Building transformers-base-0.4.1...
> [1 of 1] Compiling Control.Monad.Base ( src/Control/Monad/Base.hs, dist/build/Control/Monad/Base.o )
> 
> src/Control/Monad/Base.hs:63:10:
>     Duplicate instance declarations:
>       instance Applicative (L.ST s)
>         -- Defined at src/Control/Monad/Base.hs:63:10
>       instance Applicative (L.ST s) -- Defined in `Control.Applicative'
> 
> src/Control/Monad/Base.hs:67:10:
>     Duplicate instance declarations:
>       instance Applicative (S.ST s)
>         -- Defined at src/Control/Monad/Base.hs:67:10
>       instance Applicative (S.ST s) -- Defined in `Control.Applicative'
> cabal: Error: some packages failed to install:
> transformers-base-0.4.1 failed during the building phase. The exception was:
> ExitFailure 1
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