Resolving dependencies... Configuring ansi-terminal-0.6.2.3... Configuring PSQueue-1.1... Building PSQueue-1.1... Building ansi-terminal-0.6.2.3... Installed PSQueue-1.1 Configuring call-stack-0.1.0... Building call-stack-0.1.0... Configuring extensible-exceptions-0.1.1.4... Installed ansi-terminal-0.6.2.3 Building extensible-exceptions-0.1.1.4... Configuring cereal-0.5.4.0... Installed call-stack-0.1.0 Configuring hostname-1.0... Installed extensible-exceptions-0.1.1.4 Building cereal-0.5.4.0... Building hostname-1.0... Configuring mtl-2.2.1... Installed hostname-1.0 Building mtl-2.2.1... Configuring network-2.6.3.1... Installed cereal-0.5.4.0 Configuring old-locale-1.0.0.7... Installed mtl-2.2.1 Building old-locale-1.0.0.7... Configuring random-1.1... Installed old-locale-1.0.0.7 Building network-2.6.3.1... Building random-1.1... Configuring primitive-0.6.2.0... Installed random-1.1 Building primitive-0.6.2.0... Configuring stm-2.4.4.1... Installed network-2.6.3.1 Building stm-2.4.4.1... Configuring text-1.2.2.1... Installed primitive-0.6.2.0 Configuring transformers-compat-0.5.1.4... Installed stm-2.4.4.1 Building text-1.2.2.1... Building transformers-compat-0.5.1.4... Installed transformers-compat-0.5.1.4 Configuring ansi-wl-pprint-0.6.7.3... Building ansi-wl-pprint-0.6.7.3... Installed ansi-wl-pprint-0.6.7.3 Configuring hopenssl-1.7... Building hopenssl-1.7... Configuring regex-base-0.93.2... Installed hopenssl-1.7 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 tf-random-0.5... Installed text-1.2.2.1 Building tf-random-0.5... Configuring MonadRandom-0.4.2.3... Installed hslogger-1.2.10 Building MonadRandom-0.4.2.3... Installed tf-random-0.5 Configuring regex-posix-0.95.2... Building regex-posix-0.95.2... Configuring parsec-3.1.11... Installed MonadRandom-0.4.2.3 Building parsec-3.1.11... Installed regex-posix-0.95.2 Configuring xml-1.3.14... Building xml-1.3.14... Configuring QuickCheck-2.9.2... Installed parsec-3.1.11 Building QuickCheck-2.9.2... Configuring random-shuffle-0.0.4... Installed xml-1.3.14 Building random-shuffle-0.0.4... Installed random-shuffle-0.0.4 Configuring network-uri-2.6.1.0... Building network-uri-2.6.1.0... Configuring test-framework-0.8.1.1... Installed network-uri-2.6.1.0 Building test-framework-0.8.1.1... Installed test-framework-0.8.1.1 Configuring HTTP-4000.3.4... Building HTTP-4000.3.4... Configuring test-framework-hunit-0.3.0.2... Installed QuickCheck-2.9.2 Building test-framework-hunit-0.3.0.2... Configuring test-framework-quickcheck2-0.3.0.3... Installed test-framework-hunit-0.3.0.2 Building test-framework-quickcheck2-0.3.0.3... Installed HTTP-4000.3.4 Installed test-framework-quickcheck2-0.3.0.3 Configuring Combinatorrent-0.2.1... Building Combinatorrent-0.2.1... Failed to install Combinatorrent-0.2.1 Build log ( /home/builder/.cabal/logs/Combinatorrent-0.2.1.log ): cabal: Entering directory '/tmp/cabal-tmp-15856/Combinatorrent-0.2.1' Configuring Combinatorrent-0.2.1... Building Combinatorrent-0.2.1... Preprocessing executable 'Combinatorrent' for Combinatorrent-0.2.1... src/Process.hs:6:16: warning: -fglasgow-exts is deprecated: Use individual extensions instead [ 1 of 32] Compiling Version ( src/Version.hs, dist/build/Combinatorrent/Combinatorrent-tmp/Version.o ) [ 2 of 32] Compiling Tracer ( src/Tracer.hs, dist/build/Combinatorrent/Combinatorrent-tmp/Tracer.o ) [ 3 of 32] Compiling TestInstance ( src/TestInstance.hs, dist/build/Combinatorrent/Combinatorrent-tmp/TestInstance.o ) src/TestInstance.hs:20:10: error: Duplicate instance declarations: instance Random Word32 -- Defined at src/TestInstance.hs:20:10 instance Random Word32 -- Defined in ‘System.Random’ src/TestInstance.hs:24:10: error: Duplicate instance declarations: instance Arbitrary Word32 -- Defined at src/TestInstance.hs:24:10 instance [safe] Arbitrary Word32 -- Defined in ‘Test.QuickCheck.Arbitrary’ src/TestInstance.hs:27:10: error: Duplicate instance declarations: instance CoArbitrary Word32 -- Defined at src/TestInstance.hs:27:10 instance [safe] CoArbitrary Word32 -- Defined in ‘Test.QuickCheck.Arbitrary’ src/TestInstance.hs:30:10: error: Duplicate instance declarations: instance Random Word8 -- Defined at src/TestInstance.hs:30:10 instance Random Word8 -- Defined in ‘System.Random’ src/TestInstance.hs:34:10: error: Duplicate instance declarations: instance Arbitrary Word8 -- Defined at src/TestInstance.hs:34:10 instance [safe] Arbitrary Word8 -- Defined in ‘Test.QuickCheck.Arbitrary’ src/TestInstance.hs:37:10: error: Duplicate instance declarations: instance CoArbitrary Word8 -- Defined at src/TestInstance.hs:37:10 instance [safe] CoArbitrary Word8 -- Defined in ‘Test.QuickCheck.Arbitrary’ cabal: Leaving directory '/tmp/cabal-tmp-15856/Combinatorrent-0.2.1' cabal: Error: some packages failed to install: Combinatorrent-0.2.1 failed during the building phase. The exception was: ExitFailure 1