[Haskell-beginners] can't build haskell-crypto

Daniel Fischer daniel.is.fischer at googlemail.com
Sun Feb 20 13:17:49 CET 2011

On Saturday 19 February 2011 21:09:54, Chris Bolton wrote:
> http://paste.pocoo.org/show/341187/
> any ideas?

At some point in time (with QuickCheck-2.1.2), the Arbitrary instances for 
Word8 and Word64 were included in Test.QuickCheck.Arbitrary. Probably 
around the same time, they were removed from QuickTest.hs in the Crypto 
package (because one can't have multiple instances for the same type).

Seems your QuickCheck is too old for the current Crypto.
You can install an older Crypto or a newer QuickCheck.
Getting the latest QuickCheck is probably the better way.


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