Resolving dependencies...
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Installed ansi-terminal-0.6.2.3
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Configuring byteable-0.1.1...
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Configuring base64-bytestring-1.0.0.1...
Installed base16-bytestring-0.1.1.6
Building byteable-0.1.1...
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Configuring call-stack-0.1.0...
Installed byteable-0.1.1
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Installed base64-bytestring-1.0.0.1
Building cereal-0.5.4.0...
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Installed call-stack-0.1.0
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Configuring dlist-0.8.0.2...
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Installed cereal-0.5.4.0
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Installed dlist-0.8.0.2
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Configuring mtl-2.2.1...
Installed hourglass-0.2.10
Building mtl-2.2.1...
Configuring memory-0.13...
Installed mtl-2.2.1
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Configuring nats-1.1.1...
Installed haskell-lexer-1.0.1
Building nats-1.1.1...
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Installed nats-1.1.1
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Configuring network-2.6.3.1...
Installed old-locale-1.0.0.7
Building network-2.6.3.1...
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Configuring random-1.1...
Installed network-2.6.3.1
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Configuring text-1.2.2.1...
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Building time-locale-compat-0.1.1.3...
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Building unix-compat-0.4.3.1...
Configuring zlib-0.6.1.2...
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Building zlib-0.6.1.2...
Installed zlib-0.6.1.2
Configuring ansi-wl-pprint-0.6.7.3...
Building ansi-wl-pprint-0.6.7.3...
Configuring HUnit-1.5.0.0...
Installed ansi-wl-pprint-0.6.7.3
Configuring pem-0.2.2...
Installed text-1.2.2.1
Building HUnit-1.5.0.0...
Building pem-0.2.2...
Configuring IfElse-0.85...
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Installed asn1-types-0.3.2
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Installed pretty-show-1.6.12
Building cryptonite-0.20...
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Configuring hslogger-1.2.10...
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Configuring socks-0.5.5...
Installed hslogger-1.2.10
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Installed socks-0.5.5
Building StateVar-1.1.0.4...
Configuring vector-0.11.0.0...
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Configuring exceptions-0.8.3...
Installed cryptonite-0.20
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Configuring async-2.1.1...
Installed vector-0.11.0.0
Configuring errors-2.1.3...
Installed tagged-0.8.5
Building async-2.1.1...
Building errors-2.1.3...
Installed async-2.1.1
Configuring optparse-applicative-0.13.0.0...
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Installed errors-2.1.3
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Building blaze-builder-0.4.0.2...
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Installed optparse-applicative-0.13.0.0
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Installed double-conversion-2.0.1.0
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Configuring asn1-encoding-0.9.4...
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Installed parsec-3.1.11
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Building x509-validation-1.6.5...
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Building vector-instances-3.3.1...
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Configuring github-0.15.0...
Building github-0.15.0...
Installed github-0.15.0
Configuring github-backup-1.20141204...
Failed to install github-backup-1.20141204
Build log ( /home/builder/.cabal/logs/github-backup-1.20141204.log ):
cabal: Entering directory '/tmp/cabal-tmp-32165/github-backup-1.20141204'
cabal: Leaving directory '/tmp/cabal-tmp-32165/github-backup-1.20141204'
cabal: Error: some packages failed to install:
github-backup-1.20141204 failed during the configure step. The exception was:
user error ('/opt/ghc/8.0.2/bin/ghc' exited with an error:

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/PosixFiles.hs:13:1:
warning: [-Wtabs]
Tab character found here, and in one further location.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/PartialPrelude.hs:47:1:
warning: [-Wtabs]
Tab character found here, and in one further location.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Monad.hs:41:1: warning:
[-Wtabs]
Tab character found here, and in four further locations.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/FileSystemEncoding.hs:11:1:
warning: [-Wtabs]
Tab character found here, and in 22 further locations.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Env.hs:81:1: warning:
[-Wtabs]
Tab character found here, and in one further location.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/UserInfo.hs:11:1:
warning: [-Wtabs]
Tab character found here, and in six further locations.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Path.hs:44:1: warning:
[-Wtabs]
Tab character found here, and in 93 further locations.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Data.hs:13:1: warning:
[-Wtabs]
Tab character found here, and in one further location.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Exception.hs:11:1:
warning: [-Wtabs]
Tab character found here, and in 27 further locations.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Misc.hs:40:1: warning:
[-Wtabs]
Tab character found here, and in 44 further locations.
Please use spaces instead.

/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Process.hs:175:28:
error:
Ambiguous occurrence ‘createPipe’
It could refer to either ‘System.Process.createPipe’,
imported from ‘System.Process’ at
/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Process.hs:41:1-57
(and originally defined in ‘System.Process.Internals’)
or ‘System.Posix.IO.createPipe’,
imported from ‘System.Posix.IO’ at
/tmp/cabal-tmp-32165/github-backup-1.20141204/Utility/Process.hs:49:1-22
(and originally defined in ‘unix-2.7.2.0:System.Posix.IO.Common’)
)