[Haskell-cafe] Running ghci in a Cabal sandbox

[Brandon Allbery]

Strictly speaking, the second option (specifying the sandbox as the user
db) is a more correct match with what cabal-install does.

On Friday, August 4, 2017, Emil Axelsson <78emil at gmail.com> wrote:

> Den 2017-08-04 kl. 19:33, skrev Daniel Trstenjak:
>
>>
>> Hi Emil,
>>
>> On Fri, Aug 04, 2017 at 07:10:09PM +0300, Emil Axelsson wrote:
>>
>>> Ah, I see. I still don't understand what went wrong in this particular
>>> case,
>>> but at least it makes sense that there's a difference between
>>> `-package-db`
>>> and `cabal exec`.
>>>
>>
>> can you please test if `cabal-cargs` behaves in the same way as `cabal
>> exec`
>> if you add a `-no-user-package-db` or/and replace `-packabe-db` by
>> `-user-package-db`.
>>
>
> Yes! `-no-user-package-db` does the trick.
>
> I have to admit I had forgotten completely about the user DB. When running
> `cabal sandbox hc-pkg list` I only see the global one and the one in the
> sandbox. But `ghc-pkg` shows the user DB and indeed it contains
> `hashable-1.2.6.1` which was causing me trouble.
>
> Cool, problem solved.
>
> Would it make sense then for `cabal-cargs` to always emit
> `-no-user-package-db` when it discovers a sandbox?
>
> Cheers
>
> / Emil
>
> Greetings,
>> Daniel
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-- 
brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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