Resolving dependencies...
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Configuring base64-bytestring-1.0.0.1...
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Installed base-compat-0.9.1
Configuring byteable-0.1.1...
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Configuring bytestring-builder-0.10.8.1.0...
Installed base64-bytestring-1.0.0.1
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Configuring cereal-0.5.4.0...
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Building cereal-0.5.4.0...
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Installed byteable-0.1.1
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Configuring clock-0.7.2...
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Configuring entropy-0.3.7...
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Configuring foundation-0.0.2...
Installed dlist-0.8.0.2
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Configuring mtl-2.2.1...
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Installed random-1.1
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Configuring stm-2.4.4.1...
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Building stm-2.4.4.1...
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Configuring time-locale-compat-0.1.1.3...
Installed stm-2.4.4.1
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Building zlib-0.6.1.2...
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Installed text-1.2.2.1
Configuring HUnit-1.5.0.0...
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Configuring regex-base-0.93.2...
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Configuring memory-0.14...
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Installed parsec-3.1.11
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Configuring crypto-api-0.13.2...
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Installed crypto-api-0.13.2
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Installed scientific-0.3.4.9
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Installed void-0.7.1
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Installed contravariant-1.4
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Building bifunctors-5.4.1...
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Configuring clientsession-0.9.1.2...
Building clientsession-0.9.1.2...
Installed snap-core-1.0.1.0
Downloading digestive-functors-snap-0.7.0.0...
Configuring heist-1.0.1.0...
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Configuring profunctors-5.2...
Building profunctors-5.2...
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Configuring snap-server-1.0.1.1...
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Installed snap-server-1.0.1.1
Configuring data-lens-2.11.1...
Building digestive-functors-snap-0.7.0.0...
Building data-lens-2.11.1...
Configuring free-4.12.4...
Installed digestive-functors-snap-0.7.0.0
Building free-4.12.4...
Installed data-lens-2.11.1
Installed free-4.12.4
Configuring adjunctions-4.3...
Building adjunctions-4.3...
Installed adjunctions-4.3
Configuring kan-extensions-5.0.1...
Building kan-extensions-5.0.1...
Installed kan-extensions-5.0.1
Configuring lens-4.15.1...
Building lens-4.15.1...
Installed lens-4.15.1
Configuring snap-1.0.0.1...
Building snap-1.0.0.1...
Failed to install snap-1.0.0.1
Build log ( /home/builder/.cabal/logs/snap-1.0.0.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-8053/snap-1.0.0.1'
Configuring snap-1.0.0.1...
Building snap-1.0.0.1...
Preprocessing library snap-1.0.0.1...
[ 1 of 27] Compiling Snap.Snaplet.Session.SessionManager ( src/Snap/Snaplet/Session/SessionManager.hs, dist/build/Snap/Snaplet/Session/SessionManager.o )
[ 2 of 27] Compiling Snap.Snaplet.Session.SecureCookie ( src/Snap/Snaplet/Session/SecureCookie.hs, dist/build/Snap/Snaplet/Session/SecureCookie.o )
[ 3 of 27] Compiling Snap.Snaplet.Session.Common ( src/Snap/Snaplet/Session/Common.hs, dist/build/Snap/Snaplet/Session/Common.o )
[ 4 of 27] Compiling Snap.Snaplet.Internal.RST ( src/Snap/Snaplet/Internal/RST.hs, dist/build/Snap/Snaplet/Internal/RST.o )
[ 5 of 27] Compiling Snap.Snaplet.Internal.Lensed ( src/Snap/Snaplet/Internal/Lensed.hs, dist/build/Snap/Snaplet/Internal/Lensed.o )
[ 6 of 27] Compiling Snap.Snaplet.Internal.LensT ( src/Snap/Snaplet/Internal/LensT.hs, dist/build/Snap/Snaplet/Internal/LensT.o )
[ 7 of 27] Compiling Snap.Snaplet.Internal.Types ( src/Snap/Snaplet/Internal/Types.hs, dist/build/Snap/Snaplet/Internal/Types.o )
[ 8 of 27] Compiling Snap.Snaplet.Config ( src/Snap/Snaplet/Config.hs, dist/build/Snap/Snaplet/Config.o )
[ 9 of 27] Compiling Snap.Snaplet.Internal.Initializer ( src/Snap/Snaplet/Internal/Initializer.hs, dist/build/Snap/Snaplet/Internal/Initializer.o )

src/Snap/Snaplet/Internal/Initializer.hs:70:48: error:
    Module ‘System.Directory.Tree’ does not export ‘dirTree’
cabal: Leaving directory '/tmp/cabal-tmp-8053/snap-1.0.0.1'
cabal: Error: some packages failed to install:
snap-1.0.0.1 failed during the building phase. The exception was:
ExitFailure 1
snap-extras-0.2.2 depends on snap-1.0.0.1 which failed to install.