[Haskell-cafe] syb-with-class problem.

[Magicloud Magiclouds]

Hi,
  I am trying to make happstack work in my box, which is using ghc 7.
  While compiling HStringTemplate, which I did a little modification
to make it work, I found that it does not work with
template-haskell-2.5.0.0. I changed it to use
template-haskell-2.4.0.1. This step worked fine.
  Then I got another error:
$ cabal install
Resolving dependencies...
Configuring syb-with-class-0.6.1.1...
Preprocessing library syb-with-class-0.6.1.1...
Building syb-with-class-0.6.1.1...
[1 of 4] Compiling Data.Generics.SYB.WithClass.Context (
Data/Generics/SYB/WithClass/Context.hs,
dist/build/Data/Generics/SYB/WithClass/Context.o )
[2 of 4] Compiling Data.Generics.SYB.WithClass.Basics (
Data/Generics/SYB/WithClass/Basics.hs,
dist/build/Data/Generics/SYB/WithClass/Basics.o )
[3 of 4] Compiling Data.Generics.SYB.WithClass.Derive (
Data/Generics/SYB/WithClass/Derive.hs,
dist/build/Data/Generics/SYB/WithClass/Derive.o )

Data/Generics/SYB/WithClass/Derive.hs:23:1:
    Bad interface file:
/home/magicloud/.cabal/lib/template-haskell-2.4.0.1/ghc-7.0.1/Language/Haskell/TH.hi
        Something is amiss; requested module
template-haskell-2.4.0.1:Language.Haskell.TH differs from name found
in the interface file template-haskell:Language.Haskell.TH
cabal: Error: some packages failed to install:
HStringTemplate-0.6.3 depends on syb-with-class-0.6.1.1 which failed to
install.
syb-with-class-0.6.1.1 failed during the building phase. The exception was:
ExitFailure 1

  How to resolve this?
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