Resolving dependencies... Configuring HUnit-1.2.5.2... Building HUnit-1.2.5.2... Preprocessing library HUnit-1.2.5.2... [1 of 5] Compiling Test.HUnit.Terminal ( Test/HUnit/Terminal.hs, dist/build/Test/HUnit/Terminal.o ) [2 of 5] Compiling Test.HUnit.Lang ( Test/HUnit/Lang.hs, dist/build/Test/HUnit/Lang.o ) [3 of 5] Compiling Test.HUnit.Base ( Test/HUnit/Base.hs, dist/build/Test/HUnit/Base.o ) [4 of 5] Compiling Test.HUnit.Text ( Test/HUnit/Text.hs, dist/build/Test/HUnit/Text.o ) [5 of 5] Compiling Test.HUnit ( Test/HUnit.hs, dist/build/Test/HUnit.o ) In-place registering HUnit-1.2.5.2... Running Haddock for HUnit-1.2.5.2... Running hscolour for HUnit-1.2.5.2... Preprocessing library HUnit-1.2.5.2... Preprocessing library HUnit-1.2.5.2... Haddock coverage: 100% ( 2 / 2) in 'Test.HUnit.Terminal' 86% ( 6 / 7) in 'Test.HUnit.Lang' 100% ( 33 / 33) in 'Test.HUnit.Base' 100% ( 8 / 8) in 'Test.HUnit.Text' 100% ( 3 / 3) in 'Test.HUnit' Documentation created: dist/doc/html/HUnit/index.html, dist/doc/html/HUnit/HUnit.txt Creating package registration file: /tmp/pkgConf-HUnit-1.2.55816.2 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/HUnit-1.2.5.2 Registering HUnit-1.2.5.2... Installed HUnit-1.2.5.2 Configuring extensible-exceptions-0.1.1.4... Building extensible-exceptions-0.1.1.4... Preprocessing library extensible-exceptions-0.1.1.4... [1 of 1] Compiling Control.Exception.Extensible ( Control/Exception/Extensible.hs, dist/build/Control/Exception/Extensible.o ) In-place registering extensible-exceptions-0.1.1.4... Running Haddock for extensible-exceptions-0.1.1.4... Running hscolour for extensible-exceptions-0.1.1.4... Preprocessing library extensible-exceptions-0.1.1.4... Preprocessing library extensible-exceptions-0.1.1.4... Haddock coverage: 100% ( 2 / 2) in 'Control.Exception.Extensible' Documentation created: dist/doc/html/extensible-exceptions/index.html, dist/doc/html/extensible-exceptions/extensible-exceptions.txt Creating package registration file: /tmp/pkgConf-extensible-exceptions-0.1.15816.4 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/extensible-exceptions-0.1.1.4 Registering extensible-exceptions-0.1.1.4... Installed extensible-exceptions-0.1.1.4 Configuring mtl-2.1.3.1... Building mtl-2.1.3.1... Preprocessing library mtl-2.1.3.1... [ 1 of 21] Compiling Control.Monad.Writer.Class ( Control/Monad/Writer/Class.hs, dist/build/Control/Monad/Writer/Class.o ) [ 2 of 21] Compiling Control.Monad.State.Class ( Control/Monad/State/Class.hs, dist/build/Control/Monad/State/Class.o ) [ 3 of 21] Compiling Control.Monad.Reader.Class ( Control/Monad/Reader/Class.hs, dist/build/Control/Monad/Reader/Class.o ) [ 4 of 21] Compiling Control.Monad.RWS.Class ( Control/Monad/RWS/Class.hs, dist/build/Control/Monad/RWS/Class.o ) [ 5 of 21] Compiling Control.Monad.Identity ( Control/Monad/Identity.hs, dist/build/Control/Monad/Identity.o ) [ 6 of 21] Compiling Control.Monad.Error.Class ( Control/Monad/Error/Class.hs, dist/build/Control/Monad/Error/Class.o ) [ 7 of 21] Compiling Control.Monad.Cont.Class ( Control/Monad/Cont/Class.hs, dist/build/Control/Monad/Cont/Class.o ) [ 8 of 21] Compiling Control.Monad.Trans ( Control/Monad/Trans.hs, dist/build/Control/Monad/Trans.o ) [ 9 of 21] Compiling Control.Monad.Error ( Control/Monad/Error.hs, dist/build/Control/Monad/Error.o ) [10 of 21] Compiling Control.Monad.List ( Control/Monad/List.hs, dist/build/Control/Monad/List.o ) [11 of 21] Compiling Control.Monad.RWS.Lazy ( Control/Monad/RWS/Lazy.hs, dist/build/Control/Monad/RWS/Lazy.o ) [12 of 21] Compiling Control.Monad.RWS ( Control/Monad/RWS.hs, dist/build/Control/Monad/RWS.o ) [13 of 21] Compiling Control.Monad.Reader ( Control/Monad/Reader.hs, dist/build/Control/Monad/Reader.o ) [14 of 21] Compiling Control.Monad.RWS.Strict ( Control/Monad/RWS/Strict.hs, dist/build/Control/Monad/RWS/Strict.o ) [15 of 21] Compiling Control.Monad.State.Lazy ( Control/Monad/State/Lazy.hs, dist/build/Control/Monad/State/Lazy.o ) [16 of 21] Compiling Control.Monad.State ( Control/Monad/State.hs, dist/build/Control/Monad/State.o ) [17 of 21] Compiling Control.Monad.State.Strict ( Control/Monad/State/Strict.hs, dist/build/Control/Monad/State/Strict.o ) [18 of 21] Compiling Control.Monad.Writer.Lazy ( Control/Monad/Writer/Lazy.hs, dist/build/Control/Monad/Writer/Lazy.o ) [19 of 21] Compiling Control.Monad.Writer ( Control/Monad/Writer.hs, dist/build/Control/Monad/Writer.o ) [20 of 21] Compiling Control.Monad.Writer.Strict ( Control/Monad/Writer/Strict.hs, dist/build/Control/Monad/Writer/Strict.o ) [21 of 21] Compiling Control.Monad.Cont ( Control/Monad/Cont.hs, dist/build/Control/Monad/Cont.o ) In-place registering mtl-2.1.3.1... Running Haddock for mtl-2.1.3.1... Running hscolour for mtl-2.1.3.1... Preprocessing library mtl-2.1.3.1... Preprocessing library mtl-2.1.3.1... Haddock coverage: 75% ( 3 / 4) in 'Control.Monad.Writer.Class' 100% ( 4 / 4) in 'Control.Monad.State.Class' 100% ( 3 / 3) in 'Control.Monad.Reader.Class' 80% ( 4 / 5) in 'Control.Monad.RWS.Class' 100% ( 4 / 4) in 'Control.Monad.Identity' 100% ( 3 / 3) in 'Control.Monad.Error.Class' 50% ( 1 / 2) in 'Control.Monad.Cont.Class' 100% ( 3 / 3) in 'Control.Monad.Trans' 100% ( 14 / 14) in 'Control.Monad.Error' 100% ( 5 / 5) in 'Control.Monad.List' 100% ( 21 / 21) in 'Control.Monad.RWS.Lazy' 100% ( 2 / 2) in 'Control.Monad.RWS' 100% ( 22 / 22) in 'Control.Monad.Reader' 100% ( 21 / 21) in 'Control.Monad.RWS.Strict' 100% ( 23 / 23) in 'Control.Monad.State.Lazy' 100% ( 2 / 2) in 'Control.Monad.State' 100% ( 23 / 23) in 'Control.Monad.State.Strict' 94% ( 17 / 18) in 'Control.Monad.Writer.Lazy' 100% ( 2 / 2) in 'Control.Monad.Writer' 94% ( 17 / 18) in 'Control.Monad.Writer.Strict' 95% ( 20 / 21) in 'Control.Monad.Cont' Documentation created: dist/doc/html/mtl/index.html, dist/doc/html/mtl/mtl.txt Creating package registration file: /tmp/pkgConf-mtl-2.1.35816.1 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/mtl-2.1.3.1 Registering mtl-2.1.3.1... Installed mtl-2.1.3.1 Configuring parallel-3.2.0.6... Building parallel-3.2.0.6... Preprocessing library parallel-3.2.0.6... [1 of 3] Compiling Control.Parallel ( Control/Parallel.hs, dist/build/Control/Parallel.o ) [2 of 3] Compiling Control.Seq ( Control/Seq.hs, dist/build/Control/Seq.o ) [3 of 3] Compiling Control.Parallel.Strategies ( Control/Parallel/Strategies.hs, dist/build/Control/Parallel/Strategies.o ) In-place registering parallel-3.2.0.6... Running Haddock for parallel-3.2.0.6... Running hscolour for parallel-3.2.0.6... Preprocessing library parallel-3.2.0.6... Preprocessing library parallel-3.2.0.6... Haddock coverage: 72% ( 21 / 29) in 'Control.Seq' 100% ( 3 / 3) in 'Control.Parallel' 81% ( 68 / 84) in 'Control.Parallel.Strategies' Documentation created: dist/doc/html/parallel/index.html, dist/doc/html/parallel/parallel.txt Creating package registration file: /tmp/pkgConf-parallel-3.2.05816.6 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/parallel-3.2.0.6 Registering parallel-3.2.0.6... Installed parallel-3.2.0.6 Configuring primitive-0.6... Building primitive-0.6... Preprocessing library primitive-0.6... [ 1 of 10] Compiling Data.Primitive.Internal.Compat ( Data/Primitive/Internal/Compat.hs, dist/build/Data/Primitive/Internal/Compat.o ) [ 2 of 10] Compiling Data.Primitive.MachDeps ( Data/Primitive/MachDeps.hs, dist/build/Data/Primitive/MachDeps.o ) [ 3 of 10] Compiling Data.Primitive.Internal.Operations ( Data/Primitive/Internal/Operations.hs, dist/build/Data/Primitive/Internal/Operations.o ) [ 4 of 10] Compiling Control.Monad.Primitive ( Control/Monad/Primitive.hs, dist/build/Control/Monad/Primitive.o ) [ 5 of 10] Compiling Data.Primitive.Types ( Data/Primitive/Types.hs, dist/build/Data/Primitive/Types.o ) [ 6 of 10] Compiling Data.Primitive.Array ( Data/Primitive/Array.hs, dist/build/Data/Primitive/Array.o ) [ 7 of 10] Compiling Data.Primitive.ByteArray ( Data/Primitive/ByteArray.hs, dist/build/Data/Primitive/ByteArray.o ) [ 8 of 10] Compiling Data.Primitive.Addr ( Data/Primitive/Addr.hs, dist/build/Data/Primitive/Addr.o ) [ 9 of 10] Compiling Data.Primitive ( Data/Primitive.hs, dist/build/Data/Primitive.o ) [10 of 10] Compiling Data.Primitive.MutVar ( Data/Primitive/MutVar.hs, dist/build/Data/Primitive/MutVar.o ) In-place registering primitive-0.6... Running Haddock for primitive-0.6... Running hscolour for primitive-0.6... Preprocessing library primitive-0.6... Preprocessing library primitive-0.6... Haddock coverage: 100% ( 3 / 3) in 'Data.Primitive.Internal.Compat' 3% ( 1 / 35) in 'Data.Primitive.MachDeps' 3% ( 1 / 29) in 'Data.Primitive.Internal.Operations' 75% ( 12 / 16) in 'Control.Monad.Primitive' 100% ( 3 / 3) in 'Data.Primitive.Types' 100% ( 15 / 15) in 'Data.Primitive.Array' 93% ( 27 / 29) in 'Data.Primitive.ByteArray' 100% ( 16 / 16) in 'Data.Primitive.Addr' 100% ( 7 / 7) in 'Data.Primitive' 100% ( 9 / 9) in 'Data.Primitive.MutVar' Documentation created: dist/doc/html/primitive/index.html, dist/doc/html/primitive/primitive.txt Creating package registration file: /tmp/pkgConf-primitive-05816.6 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/primitive-0.6 Registering primitive-0.6... Installed primitive-0.6 Configuring random-1.1... Building random-1.1... Preprocessing library random-1.1... [1 of 1] Compiling System.Random ( System/Random.hs, dist/build/System/Random.o ) In-place registering random-1.1... Running Haddock for random-1.1... Running hscolour for random-1.1... Preprocessing library random-1.1... Preprocessing library random-1.1... Haddock coverage: Cannot find documentation for: $intro 100% ( 16 / 16) in 'System.Random' Documentation created: dist/doc/html/random/index.html, dist/doc/html/random/random.txt Creating package registration file: /tmp/pkgConf-random-15816.1 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/random-1.1 Registering random-1.1... Installed random-1.1 Configuring stm-2.4.4... Building stm-2.4.4... Preprocessing library stm-2.4.4... [ 1 of 10] Compiling Control.Sequential.STM ( Control/Sequential/STM.hs, dist/build/Control/Sequential/STM.o ) [ 2 of 10] Compiling Control.Concurrent.STM.TBQueue ( Control/Concurrent/STM/TBQueue.hs, dist/build/Control/Concurrent/STM/TBQueue.o ) [ 3 of 10] Compiling Control.Concurrent.STM.TQueue ( Control/Concurrent/STM/TQueue.hs, dist/build/Control/Concurrent/STM/TQueue.o ) [ 4 of 10] Compiling Control.Concurrent.STM.TChan ( Control/Concurrent/STM/TChan.hs, dist/build/Control/Concurrent/STM/TChan.o ) [ 5 of 10] Compiling Control.Concurrent.STM.TMVar ( Control/Concurrent/STM/TMVar.hs, dist/build/Control/Concurrent/STM/TMVar.o ) [ 6 of 10] Compiling Control.Concurrent.STM.TVar ( Control/Concurrent/STM/TVar.hs, dist/build/Control/Concurrent/STM/TVar.o ) [ 7 of 10] Compiling Control.Concurrent.STM.TArray ( Control/Concurrent/STM/TArray.hs, dist/build/Control/Concurrent/STM/TArray.o ) [ 8 of 10] Compiling Control.Monad.STM ( Control/Monad/STM.hs, dist/build/Control/Monad/STM.o ) [ 9 of 10] Compiling Control.Concurrent.STM ( Control/Concurrent/STM.hs, dist/build/Control/Concurrent/STM.o ) [10 of 10] Compiling Control.Concurrent.STM.TSem ( Control/Concurrent/STM/TSem.hs, dist/build/Control/Concurrent/STM/TSem.o ) In-place registering stm-2.4.4... Running Haddock for stm-2.4.4... Running hscolour for stm-2.4.4... Preprocessing library stm-2.4.4... Preprocessing library stm-2.4.4... Haddock coverage: 0% ( 0 / 11) in 'Control.Sequential.STM' 100% ( 13 / 13) in 'Control.Concurrent.STM.TBQueue' 100% ( 12 / 12) in 'Control.Concurrent.STM.TQueue' 100% ( 18 / 18) in 'Control.Concurrent.STM.TChan' 100% ( 16 / 16) in 'Control.Concurrent.STM.TMVar' 100% ( 13 / 13) in 'Control.Concurrent.STM.TVar' 100% ( 2 / 2) in 'Control.Concurrent.STM.TArray' 90% ( 9 / 10) in 'Control.Monad.STM' 100% ( 8 / 8) in 'Control.Concurrent.STM' 40% ( 2 / 5) in 'Control.Concurrent.STM.TSem' Documentation created: dist/doc/html/stm/index.html, dist/doc/html/stm/stm.txt Creating package registration file: /tmp/pkgConf-stm-2.45816.4 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/stm-2.4.4 Registering stm-2.4.4... Installed stm-2.4.4 Configuring tf-random-0.5... Building tf-random-0.5... Preprocessing library tf-random-0.5... [1 of 4] Compiling System.Random.TF.Gen ( src/System/Random/TF/Gen.hs, dist/build/System/Random/TF/Gen.o ) [2 of 4] Compiling System.Random.TF.Init ( src/System/Random/TF/Init.hs, dist/build/System/Random/TF/Init.o ) src/System/Random/TF/Init.hs:94:5: Warning: In the use of ‘bitSize’ (imported from Data.Bits): Deprecated: "Use 'bitSizeMaybe' or 'finiteBitSize' instead" [3 of 4] Compiling System.Random.TF.Instances ( src/System/Random/TF/Instances.hs, dist/build/System/Random/TF/Instances.o ) [4 of 4] Compiling System.Random.TF ( src/System/Random/TF.hs, dist/build/System/Random/TF.o ) In-place registering tf-random-0.5... Running Haddock for tf-random-0.5... Running hscolour for tf-random-0.5... Preprocessing library tf-random-0.5... Preprocessing library tf-random-0.5... src/System/Random/TF/Init.hs:94:5: Warning: In the use of ‘bitSize’ (imported from Data.Bits): Deprecated: "Use 'bitSizeMaybe' or 'finiteBitSize' instead" Haddock coverage: 100% ( 4 / 4) in 'System.Random.TF.Gen' 83% ( 5 / 6) in 'System.Random.TF.Init' 33% ( 1 / 3) in 'System.Random.TF.Instances' 100% ( 3 / 3) in 'System.Random.TF' Documentation created: dist/doc/html/tf-random/index.html, dist/doc/html/tf-random/tf-random.txt Creating package registration file: /tmp/pkgConf-tf-random-05816.5 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/tf-random-0.5 Registering tf-random-0.5... Installed tf-random-0.5 Configuring QuickCheck-2.8.1... Building QuickCheck-2.8.1... Preprocessing library QuickCheck-2.8.1... [ 1 of 15] Compiling Test.QuickCheck.Random ( Test/QuickCheck/Random.hs, dist/build/Test/QuickCheck/Random.o ) [ 2 of 15] Compiling Test.QuickCheck.Exception ( Test/QuickCheck/Exception.hs, dist/build/Test/QuickCheck/Exception.o ) [ 3 of 15] Compiling Test.QuickCheck.Text ( Test/QuickCheck/Text.hs, dist/build/Test/QuickCheck/Text.o ) [ 4 of 15] Compiling Test.QuickCheck.State ( Test/QuickCheck/State.hs, dist/build/Test/QuickCheck/State.o ) [ 5 of 15] Compiling Test.QuickCheck.Gen ( Test/QuickCheck/Gen.hs, dist/build/Test/QuickCheck/Gen.o ) [ 6 of 15] Compiling Test.QuickCheck.Gen.Unsafe ( Test/QuickCheck/Gen/Unsafe.hs, dist/build/Test/QuickCheck/Gen/Unsafe.o ) [ 7 of 15] Compiling Test.QuickCheck.Arbitrary ( Test/QuickCheck/Arbitrary.hs, dist/build/Test/QuickCheck/Arbitrary.o ) [ 8 of 15] Compiling Test.QuickCheck.Modifiers ( Test/QuickCheck/Modifiers.hs, dist/build/Test/QuickCheck/Modifiers.o ) [ 9 of 15] Compiling Test.QuickCheck.Poly ( Test/QuickCheck/Poly.hs, dist/build/Test/QuickCheck/Poly.o ) [10 of 15] Compiling Test.QuickCheck.Function ( Test/QuickCheck/Function.hs, dist/build/Test/QuickCheck/Function.o ) [11 of 15] Compiling Test.QuickCheck.Property ( Test/QuickCheck/Property.hs, dist/build/Test/QuickCheck/Property.o ) [12 of 15] Compiling Test.QuickCheck.Test ( Test/QuickCheck/Test.hs, dist/build/Test/QuickCheck/Test.o ) [13 of 15] Compiling Test.QuickCheck.All ( Test/QuickCheck/All.hs, dist/build/Test/QuickCheck/All.o ) [14 of 15] Compiling Test.QuickCheck.Monadic ( Test/QuickCheck/Monadic.hs, dist/build/Test/QuickCheck/Monadic.o ) [15 of 15] Compiling Test.QuickCheck ( Test/QuickCheck.hs, dist/build/Test/QuickCheck.o ) In-place registering QuickCheck-2.8.1... Running Haddock for QuickCheck-2.8.1... Running hscolour for QuickCheck-2.8.1... Preprocessing library QuickCheck-2.8.1... Preprocessing library QuickCheck-2.8.1... Haddock coverage: 10% ( 2 / 20) in 'Test.QuickCheck.Random' 33% ( 3 / 9) in 'Test.QuickCheck.Exception' 6% ( 1 / 18) in 'Test.QuickCheck.Text' 100% ( 2 / 2) in 'Test.QuickCheck.State' 89% ( 25 / 28) in 'Test.QuickCheck.Gen' 80% ( 4 / 5) in 'Test.QuickCheck.Gen.Unsafe' 100% ( 32 / 32) in 'Test.QuickCheck.Arbitrary' 93% ( 14 / 15) in 'Test.QuickCheck.Modifiers' 14% ( 1 / 7) in 'Test.QuickCheck.Poly' 38% ( 3 / 8) in 'Test.QuickCheck.Function' 62% ( 44 / 71) in 'Test.QuickCheck.Property' 50% ( 14 / 28) in 'Test.QuickCheck.Test' 100% ( 9 / 9) in 'Test.QuickCheck.All' 78% ( 14 / 18) in 'Test.QuickCheck.Monadic' 99% (127 /128) in 'Test.QuickCheck' Warning: Test.QuickCheck.Arbitrary: could not find link destinations for: Test.QuickCheck.Arbitrary.RecursivelyShrink Test.QuickCheck.Arbitrary.GSubterms Test.QuickCheck.Arbitrary.GCoArbitrary Test.QuickCheck.Arbitrary.gSubterms Test.QuickCheck.Arbitrary.gSubtermsIncl Warning: Test.QuickCheck: could not find link destinations for: Test.QuickCheck.Arbitrary.GCoArbitrary Test.QuickCheck.Arbitrary.RecursivelyShrink Test.QuickCheck.Arbitrary.GSubterms Documentation created: dist/doc/html/QuickCheck/index.html, dist/doc/html/QuickCheck/QuickCheck.txt Creating package registration file: /tmp/pkgConf-QuickCheck-2.85816.1 Installing library in /home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/QuickCheck-2.8.1 Registering QuickCheck-2.8.1... Installed QuickCheck-2.8.1 Downloading chp-1.7.0... Warning: chp.cabal: A package using 'cabal-version: >=1.2.3' must use section syntax. See the Cabal user guide for details. Configuring chp-1.7.0... Building chp-1.7.0... Preprocessing library chp-1.7.0... [ 1 of 37] Compiling Control.Concurrent.CHP.ProcessId ( Control/Concurrent/CHP/ProcessId.hs, dist/build/Control/Concurrent/CHP/ProcessId.o ) [ 2 of 37] Compiling Control.Concurrent.CHP.Mutex ( Control/Concurrent/CHP/Mutex.hs, dist/build/Control/Concurrent/CHP/Mutex.o ) [ 3 of 37] Compiling Control.Concurrent.CHP.Poison ( Control/Concurrent/CHP/Poison.hs, dist/build/Control/Concurrent/CHP/Poison.o ) Control/Concurrent/CHP/Poison.hs:41:10: Warning: ‘WithPoison’ is an instance of Monad but not Applicative - this will become an error in GHC 7.10, under the Applicative-Monad Proposal. [ 4 of 37] Compiling Control.Concurrent.CHP.Event ( Control/Concurrent/CHP/Event.hs, dist/build/Control/Concurrent/CHP/Event.o ) Control/Concurrent/CHP/Event.hs:496:8: Warning: A do-notation statement discarded a result of type ‘WithPoison ()’ Suppress this warning by saying ‘_ <- makeOffers offer’ or by using the flag -fno-warn-unused-do-bind [ 5 of 37] Compiling Control.Concurrent.CHP.Traces.Base ( Control/Concurrent/CHP/Traces/Base.hs, dist/build/Control/Concurrent/CHP/Traces/Base.o ) [ 6 of 37] Compiling Control.Concurrent.CHP.Guard ( Control/Concurrent/CHP/Guard.hs, dist/build/Control/Concurrent/CHP/Guard.o ) Control/Concurrent/CHP/Guard.hs:37:1: Warning: The import of ‘System.IO’ is redundant except perhaps to import instances from ‘System.IO’ To import instances alone, use: import System.IO() [ 7 of 37] Compiling Control.Concurrent.CHP.Base ( Control/Concurrent/CHP/Base.hs, dist/build/Control/Concurrent/CHP/Base.o ) Control/Concurrent/CHP/Base.hs:73:13: No instance for (Functor CHP') arising from the 'deriving' clause of a data type declaration Possible fix: use a standalone 'deriving instance' declaration, so you can specify the instance context yourself When deriving the instance for (Functor CHP) Failed to install chp-1.7.0 cabal: Error: some packages failed to install: chp-1.7.0 failed during the building phase. The exception was: ExitFailure 1