Awesome. That works. Thanks a lot. 2016-08-05 0:32 GMT+10:00 adv_zxy :

Have you tried 'stack exec -- ghci'? This way ghci should be able to find the packages stack installed.

On Thu, Aug 4, 2016, 10:27 PM Dan Phillips wrote:

...

Hi all

I'm trying to follow this tutorial about lenses:

https://hackage.haskell.org/package/lens-tutorial-1.0.1/ docs/Control-Lens-Tutorial.html

Right at the top of the tutorial,it says do this in ghci:

import Control.Lens.Tutorial

I tried that, but I got an error: "Could not find module `Control.Lens.Tutorial'"

So I tried this:

D:\Sync\src\tutorials> stack install lens-tutorial Run from outside a project, using implicit global project config Using resolver: lts-6.9 from implicit global project's config file: C:\Users\dan\AppData\Roaming\stack\global-project\stack.yaml lens-tutorial-1.0.1: download lens-tutorial-1.0.1: configure lens-tutorial-1.0.1: build lens-tutorial-1.0.1: copy/register

I'm not exactly sure what that did, but it looked promising. However, I still get the same error in ghci as before when I do the import.

My question is, what do I need to do to get the import statement working in ghci so I can follow the tutorial? I would be grateful for any guidance. Thanks.

Regards Dan Phillips _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners

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Xiangyu Zhu

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