[Haskell-beginners] cabal install snap-server-0.9.5.1: At least the following dependencies are missing: attoparsec >=0.10 && <0.13 && ==0.13.0.1

[Imants Cekusins]

> snap-server-0.9.5.1 failed during the configure step.


just a guess:

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https://hackage.haskell.org/package/snap-server-0.9.5.1/src/snap-server.cabal

attoparsec                >= 0.10     && < 0.13,

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this line seems odd:
attoparsec >=0.10 && <0.13 && ==0.13.0.1

particularly this part:
<0.13 && ==0.13.0.1

maybe try to use sandbox?