Weird interplay between overloaded strings and rebindable syntax. Why does this happen? Which tool is at fault? Both Stack 1.0.5 and Cabal 1.22.9.0 exhibit this problem.

example.cabal

name: example
version: 1
cabal-version: >=1.10
build-type: Simple

library
    build-depends: base
    default-language: Haskell2010
    default-extensions:
        OverloadedStrings
        RebindableSyntax
    other-modules: Paths_example

output.sh

example> stack --version
Version 1.0.5, Git revision 1f56aa4862bac82adcf655152561bf9f88b08a62 x86_64 hpack-0.12.0
example> stack build
example-1: configure
Configuring example-1...
example-1: build
Preprocessing library example-1...
[1 of 1] Compiling Paths_example    ( .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs, .stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/Paths_example.o )

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:19:14:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:20:14:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:21:14:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:22:14:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:23:14:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:26:29:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:27:29:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:28:30:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:29:33:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:30:33:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

/private/tmp/example/.stack-work/dist/x86_64-osx/Cabal-1.22.5.0/build/autogen/Paths_example.hs:35:18:
    Not in scope: ‘fromString’
    Perhaps you meant ‘showString’ (imported from Prelude)

--  While building package example-1 using:
      /Users/tfausak/.stack/setup-exe-cache/x86_64-osx/setup-Simple-Cabal-1.22.5.0-ghc-7.10.3 --builddir=.stack-work/dist/x86_64-osx/Cabal-1.22.5.0 build lib:example --ghc-options " -ddump-hi -ddump-to-file"
    Process exited with code: ExitFailure 1

stack.yaml

resolver: nightly-2016-04-20