[Haskell-cafe] Cabal message problem.
magicloud.magiclouds at gmail.com
Thu Dec 16 07:26:18 CET 2010
On Thu, Dec 16, 2010 at 2:24 PM, Magicloud Magiclouds
<magicloud.magiclouds at gmail.com> wrote:
> On Thu, Dec 16, 2010 at 10:55 AM, Ivan Lazar Miljenovic
> <ivan.miljenovic at gmail.com> wrote:
>> On 16 December 2010 13:35, Magicloud Magiclouds
>> <magicloud.magiclouds at gmail.com> wrote:
>>> I see this kind of information a lot when I using cabal to install
>>> package. Or sometimes same packages both exist in global and user
>>> space, which is a "shadowed by" message.
>>> How to resolve that? Thanks.
>>> Resolving dependencies...
>>> <command line>: cannot satisfy -package Cabal-18.104.22.168:
>>> Cabal-22.214.171.124-9ac678c7f1e4f8dd31bac0e19f600698 is unusable due to
>>> missing or recursive dependencies:
>>> (use -v for more information)
>> This means you built Cabal-126.96.36.199 against process-188.8.131.52, but have
>> subsequently upgraded (or downgraded or uninstalled) process. As
>> such, rebuild Cabal.
>> "ghc-pkg check" will give you a list of all broken packages.
>> Ivan Lazar Miljenovic
>> Ivan.Miljenovic at gmail.com
> The annoying thing is, I did not upgrade Cabal. Cabal and process are
> now coming with ghc 7. But many cabal packages do not know about this,
> I am not sure if this is cabal's fault or the packages'. So when
> installing some packages by cabal, they install the same version of,
> for example, process again. Then other packages depend on Cabal will
> give out this error.
And, sure, I could reinstall Cabal. Then things seem fine. But it is
weird. I have to have the same packages installed at two places of the
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