[Haskell-beginners] requested module name differs from name found in interface file

[Larry Evans]

With a file containing:

> module Main where
>
> import Array
> import Control.Functor.Fix
I get:

> make
> ghc -i/root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2 -c 
> catamorphism.example.hs
>
> catamorphism.example.hs:19:0:
>     Bad interface file: 
> /root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2/Control/Functor/Fix.hi
>         Something is amiss; requested module  main:Control.Functor.Fix 
> differs from name found in the interface file 
> category-extras-0.53.5:Control.Functor.Fix
> make: *** [all] Error 1
I used cabal to install category-extras:

> /home/evansl/download/haskell/libs # cabal install category-extras
> Resolving dependencies...
> Downloading category-extras-0.53.5...
> Configuring category-extras-0.53.5...
> Preprocessing library category-extras-0.53.5...
...
> /usr/bin/ar: creating dist/build/libHScategory-extras-0.53.5.a
> Installing library in /root/.cabal/lib/category-extras-0.53.5/ghc-6.8.2
> Registering category-extras-0.53.5...
> Reading package info from "dist/installed-pkg-config" ... done.
> Saving old package config file... done.
> Writing new package config file... done.
> /home/evansl/download/haskell/libs #
What should I do to import the Functor.Fix as shown here:

http://comonad.com/reader/2008/recursion-schemes/

TIA.

-Larry



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