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

[Thiago Negri]

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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