[Haskell-cafe] Weird error during derive-2.3.0.2 build

[Alex]

Hi all.

I am trying to install the "yi" editor using cabal-install, which in turns
installs the package 'derive-2.3.0.2'. I get the following error during
derive's compilation:

[53 of 58] Compiling Data.Derive.Internal.Traversal (
Data/Derive/Internal/Traversal.hs,
dist/build/Data/Derive/Internal/Traversal.o )

Data/Derive/Internal/Traversal.hs:34:0:
    Illegal instance declaration for `Applicative (Writer w)'
        (All instance types must be of the form (T t1 ... tn)
         where T is not a synonym.
         Use -XTypeSynonymInstances if you want to disable this.)
    In the instance declaration for `Applicative (Writer w)'
cabal: Error: some packages failed to install:
derive-2.3.0.2 failed during the building phase. The exception was:
ExitFailure 1

Of course, I tried to build it with --ghc-option=-XTypeSynonymInstances,
which in turn gives another compilation error.

I am using ubuntu maverick 32-bit, with ghc-6.12.1 and cabal-install 0.8.2.
The ghc was installed from the package repository. Cabal was installed
using:

cabal-install cabal

Alex.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/haskell-cafe/attachments/20101213/c73c88e8/attachment.htm>