[Haskell-cafe] Need help: Cabal rejecting stringsearch, conflict in base

[Thiago Negri]

I did the easy way and it worked!
The bad thing is that after restarting my laptop, xmonad and xmobar were
gone.
I recompiled xmonad and it's ok, but xmobar is failing to build because
"unix" package is failing because "Signals.h" is missing (used by
System.Posix.Signals).
:-(

I guess my cabal environment is messed up.
Is `rm -rf ~/.ghc ~/.cabal` supposed to reset cabal installation?
How do I start a fresh cabal environment?




2013/11/26 Clark Gaebel <cgaebel at uwaterloo.ca>

> You've got two options:
>
> 1) (the easy way)
>
> rm -rf ~/.ghc ~/.cabal
> cabal update
> cabal install scotty
>
> 2) (the hard way, ghc 7.6+ only)
>
> Use a sandbox!
>
> cd path/to/my/project/that/uses/scotty
> cabal sandbox init
> cabal install --only-dependencies -j # make sure scotty is a dependency of
> your project
> cabal configure
> cabal build
>
> 3) use cabal-dev. similar to using sandboxes, but I don't have it any more
> so can't give you a step-by-step.
>
>
> On Tue, Nov 26, 2013 at 7:34 PM, Thiago Negri <evohunz at gmail.com> wrote:
>
>> I don't know what to do. :-(
>> I can't install scotty or yesod.
>>
>> $ cabal install scotty
>> cabal: Could not resolve dependencies:
>> trying: scotty-0.5.0 (user goal)
>> trying: base-4.7.0.0/installed-dc1... (dependency of scotty-0.5.0)
>> trying: wai-extra-1.3.4.6 (dependency of scotty-0.5.0)
>> trying: stringsearch-0.3.6.4 (dependency of wai-extra-1.3.4.6)
>> rejecting: stringsearch-0.3.6.4:-base3 (conflict:
>> base==4.7.0.0/installed-dc1..., stringsearch-0.3.6.4:base3 => base>=2 &&
>> <3)
>> rejecting: stringsearch-0.3.6.4:+base3 (conflict:
>> base==4.7.0.0/installed-dc1..., stringsearch-0.3.6.4:base3 => base>=3 &&
>> <4)
>> Backjump limit reached (change with --max-backjumps).
>>
>>
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>>
>
>
> --
> Clark.
>
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