Resolving dependencies...
Configuring call-stack-0.1.0...
Configuring mtl-2.2.1...
Building call-stack-0.1.0...
Building mtl-2.2.1...
Configuring cmdargs-0.10.14...
Installed call-stack-0.1.0
Building cmdargs-0.10.14...
Configuring old-locale-1.0.0.7...
Installed mtl-2.2.1
Building old-locale-1.0.0.7...
Configuring primitive-0.6.2.0...
Installed old-locale-1.0.0.7
Building primitive-0.6.2.0...
Configuring network-2.6.3.1...
Installed primitive-0.6.2.0
Building network-2.6.3.1...
Configuring random-1.1...
Installed cmdargs-0.10.14
Building random-1.1...
Configuring syb-0.6...
Installed network-2.6.3.1
Configuring text-1.2.2.1...
Installed random-1.1
Building syb-0.6...
Building text-1.2.2.1...
Installed syb-0.6
Configuring regex-base-0.93.2...
Building regex-base-0.93.2...
Configuring HUnit-1.5.0.0...
Installed regex-base-0.93.2
Building HUnit-1.5.0.0...
Configuring hslogger-1.2.10...
Installed HUnit-1.5.0.0
Building hslogger-1.2.10...
Configuring old-time-1.1.0.3...
Installed hslogger-1.2.10
Configuring tf-random-0.5...
Installed text-1.2.2.1
Building old-time-1.1.0.3...
Building tf-random-0.5...
Installed old-time-1.1.0.3
Configuring regex-posix-0.95.2...
Configuring parsec-3.1.11...
Installed tf-random-0.5
Building regex-posix-0.95.2...
Building parsec-3.1.11...
Installed regex-posix-0.95.2
Configuring regex-compat-0.95.1...
Building regex-compat-0.95.1...
Configuring QuickCheck-2.9.2...
Installed regex-compat-0.95.1
Building QuickCheck-2.9.2...
Installed parsec-3.1.11
Configuring MissingH-1.4.0.1...
Building MissingH-1.4.0.1...
Configuring json-0.9.1...
Installed MissingH-1.4.0.1
Building json-0.9.1...
Configuring network-uri-2.6.1.0...
Installed QuickCheck-2.9.2
Building network-uri-2.6.1.0...
Installed json-0.9.1
Installed network-uri-2.6.1.0
Configuring HTTP-4000.3.4...
Building HTTP-4000.3.4...
Installed HTTP-4000.3.4
Configuring kit-0.3...
Building kit-0.3...
Failed to install kit-0.3
Build log ( /home/builder/.cabal/logs/kit-0.3.log ):
cabal: Entering directory '/tmp/cabal-tmp-6255/kit-0.3'
Configuring kit-0.3...
Building kit-0.3...
Preprocessing executable 'kit' for kit-0.3...
[ 1 of 13] Compiling Kit.XCode.ProjectFile ( Kit/XCode/ProjectFile.hs, dist/build/kit/kit-tmp/Kit/XCode/ProjectFile.o )

Kit/XCode/ProjectFile.hs:21:5: warning: [-Wtabs]
    Tab character found here, and in 483 further locations.
    Please use spaces instead.
[ 2 of 13] Compiling Kit.XCode.Common ( Kit/XCode/Common.hs, dist/build/kit/kit-tmp/Kit/XCode/Common.o )
[ 3 of 13] Compiling Kit.Util         ( Kit/Util.hs, dist/build/kit/kit-tmp/Kit/Util.o )

Kit/Util.hs:38:12: error:
    Duplicate instance declarations:
      instance Foldable (Either c) -- Defined at Kit/Util.hs:38:12
      instance Foldable (Either a) -- Defined in ‘Data.Foldable’

Kit/Util.hs:42:12: error:
    Duplicate instance declarations:
      instance Traversable (Either c) -- Defined at Kit/Util.hs:42:12
      instance Traversable (Either a) -- Defined in ‘Data.Traversable’
cabal: Leaving directory '/tmp/cabal-tmp-6255/kit-0.3'
cabal: Error: some packages failed to install:
kit-0.3 failed during the building phase. The exception was:
ExitFailure 1