[jhc] Please help building jhc

[Thorkil Naur]

Hello,

Attempting to build jhc (the make install), I get:

[  8 of 166] Compiling Util.ArbitraryInstances ( Util/ArbitraryInstances.hs, 
Util/ArbitraryInstances.o )

Util/ArbitraryInstances.hs:7:0:
    Duplicate instance declarations:
      instance [overlap ok] (Arbitrary a) => Arbitrary (Maybe a)
        -- Defined at Util/ArbitraryInstances.hs:7:0
      instance (Arbitrary a) => Arbitrary (Maybe a)
        -- Defined in Test.QuickCheck

Util/ArbitraryInstances.hs:14:0:
    Duplicate instance declarations:
      instance [overlap ok] (Arbitrary a, Arbitrary b) =>
                            Arbitrary (Either a b)
        -- Defined at Util/ArbitraryInstances.hs:14:0
      instance (Arbitrary a, Arbitrary b) => Arbitrary (Either a b)
        -- Defined in Test.QuickCheck
make: *** [jhc] Error 1
tn at linux:~>

This happens on a PPC Mac OS X 10.4. GHC is ghc 6.6 branch from February 21st 
2007.

Help to proceed from here would be most appreciated. 

Thanks and the best regards
Thorkil