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Configuring yesod-fay-0.3.0...
Building yesod-fay-0.3.0...
Failed to install yesod-fay-0.3.0
Build log ( /home/builder/.cabal/logs/yesod-fay-0.3.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-6320/yesod-fay-0.3.0'
Configuring yesod-fay-0.3.0...
Building yesod-fay-0.3.0...
Preprocessing library yesod-fay-0.3.0...
[1 of 2] Compiling Language.Fay.Yesod ( Language/Fay/Yesod.hs, dist/build/Language/Fay/Yesod.o )

Language/Fay/Yesod.hs:12:1: error:
    Failed to load interface for ‘Language.Fay.FFI’
    Use -v to see a list of the files searched for.
cabal: Leaving directory '/tmp/cabal-tmp-6320/yesod-fay-0.3.0'
cabal: Error: some packages failed to install:
yesod-fay-0.3.0 failed during the building phase. The exception was:
ExitFailure 1