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

[jean-christophe mincke]

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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