I'll try that. Thanks, Adam.

For my own learning, what's the meaning of this file?

It seems to be a listing of all Haskell LTS 8.13 libraries? Is that because 
Hackage hosts all Haskell libraries? 

On Tuesday, May 16, 2017 at 7:16:10 AM UTC-4, Adam Bergmark wrote:
>
> I'm not sure if there's a better way to refer to cabal.configs, but you 
> can replace it by the latset one: 
> https://www.stackage.org/lts-8.13/cabal.config
>
> On Tue, 16 May 2017 at 13:14 Kevin Meredith <[email protected] 
> <javascript:>> wrote:
>
>> What's the correct way to upgrade libraries in a stack project?
>>
>> In my project, I have both a stack.yaml and cabal.config. The former only 
>> contains the Haskell version:
>>
>> # Specifies the GHC version and set of packages available (e.g., lts-3.5, 
>> nightly-2015-09-21, ghc-7.10.2)
>> resolver: lts-8.13
>>
>> However, the cabal.config contains a bunch of libraries' versions:
>>
>> $head cabal.config 
>> -- Stackage snapshot from: http://www.stackage.org/snapshot/lts-8.12
>> -- Please place this file next to your .cabal file as cabal.config
>> -- To only use tested packages, uncomment the following line:
>> -- remote-repo: stackage-lts-8.12:http://www.stackage.org/lts-8.12
>> constraints: abstract-deque ==0.3,
>>              abstract-par ==0.3.3,
>>              AC-Vector ==2.3.2,
>>              accelerate ==0.15.1.0,
>>              accuerr ==0.2.0.2,
>>              ace ==0.6,
>>
>> If I wanted to upgrade a library in my project, how would I do that? 
>>
>> Thanks,
>> Kevin
>>
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