Also it is recommended to install things into project specific sandboxes rather than globally. E.g. mkdir myProj cd myProj cabal sandbox init cabal install hxq Martin Imants Cekusins:

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Ambiguous module name `Prelude': it was found in multiple packages: base haskell98-2.0.0.2

just guessing:

https://hackage.haskell.org/package/HXQ -> https://hackage.haskell.org/package/haskell98 -> base (==4.7.*),

what base version was installed on your pc before you tried to install HXQ?

is it possible to install multiple base versions? _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners

On Tue, 05 Jan 2016 18:25:10 +0100, Stanislaw Findeisen wrote:

On 2016-01-05 01:56, Henk-Jan van Tuyl wrote:

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On Mon, 04 Jan 2016 16:59:13 +0100, Stanislaw Findeisen wrote:

[...]

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src/Text/XML/HXQ/XQuery.hs:1:1: Ambiguous module name `Prelude': it was found in multiple packages: base haskell98-2.0.0.2 cabal: Error: some packages failed to install: HXQ-0.19.0 failed during the building phase. The exception was: ExitFailure 1

I think the answer is given at: http://stackoverflow.com/questions/7339635/ambiguous-module-name-prelude

HXQ is not updated since 2011; the package haskell98 should be removed from the dependencies.

Ok, so how can one use HXQ in a project?

You can do "cabal unpack hxq" and update the file hxq.cabal; I tried it and there are many more things that need updates. Your best bet would be to ask the author to update the package. Otherwise, you could ask the Haskell Café if someone would like to take over maintenance of HXQ. Regards, Henk-Jan van Tuyl -- Folding@home What if you could share your unused computer power to help find a cure? In just 5 minutes you can join the world's biggest networked computer and get us closer sooner. Watch the video. http://folding.stanford.edu/ http://Van.Tuyl.eu/ http://members.chello.nl/hjgtuyl/tourdemonad.html Haskell programming --