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

Just remove the .ghc. No need to touch .cabal. On Friday, November 29, 2013, Thiago Negri wrote:

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 >

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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

...

wrote:

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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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