Resolving dependencies...
Configuring bmp-1.2.6.3...
Configuring list-extras-0.4.1.4...
Building bmp-1.2.6.3...
Building list-extras-0.4.1.4...
Installed list-extras-0.4.1.4
Configuring monad-loops-0.4.3...
Building monad-loops-0.4.3...
Configuring monads-tf-0.1.0.3...
Installed bmp-1.2.6.3
Configuring parallel-3.2.1.0...
Installed monad-loops-0.4.3
Building monads-tf-0.1.0.3...
Building parallel-3.2.1.0...
Configuring random-1.1...
Installed parallel-3.2.1.0
Building random-1.1...
Configuring stm-2.4.4.1...
Installed monads-tf-0.1.0.3
Building stm-2.4.4.1...
Configuring mtl-2.2.1...
Installed random-1.1
Building mtl-2.2.1...
Configuring transformers-compat-0.5.1.4...
Installed stm-2.4.4.1
Building transformers-compat-0.5.1.4...
Installed transformers-compat-0.5.1.4
Installed mtl-2.2.1
Configuring exceptions-0.8.3...
Building exceptions-0.8.3...
Installed exceptions-0.8.3
Configuring reactivity-0.3.2.0...
Building reactivity-0.3.2.0...
Failed to install reactivity-0.3.2.0
Build log ( /home/builder/.cabal/logs/reactivity-0.3.2.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-7363/reactivity-0.3.2.0'
Configuring reactivity-0.3.2.0...
Building reactivity-0.3.2.0...
Preprocessing library reactivity-0.3.2.0...

src/FRP/Reactivity/RPC.hs:1:20: warning:
    -XGeneralizedNewtypeDeriving is not allowed in Safe Haskell; ignoring -XGeneralizedNewtypeDeriving
[1 of 8] Compiling FRP.Reactivity.RPC ( src/FRP/Reactivity/RPC.hs, dist/build/FRP/Reactivity/RPC.o )

src/FRP/Reactivity/RPC.hs:18:1: warning: [-Wtabs]
    Tab character found here, and in 22 further locations.
    Please use spaces instead.
[2 of 8] Compiling Data.WeakDict    ( src/Data/WeakDict.hs, dist/build/Data/WeakDict.o )

src/Data/WeakDict.hs:21:1: warning: [-Wtabs]
    Tab character found here, and in 185 further locations.
    Please use spaces instead.
[3 of 8] Compiling Control.CUtils.FChan ( src/Control/CUtils/FChan.hs, dist/build/Control/CUtils/FChan.o )

src/Control/CUtils/FChan.hs:34:1: warning: [-Wtabs]
    Tab character found here, and in 38 further locations.
    Please use spaces instead.
[4 of 8] Compiling Control.CUtils.Conc ( src/Control/CUtils/Conc.hs, dist/build/Control/CUtils/Conc.o )

src/Control/CUtils/Conc.hs:68:10: error:
    • Illegal instance declaration for ‘Concurrent (Kleisli IO)’
        (All instance types must be of the form (T a1 ... an)
         where a1 ... an are *distinct type variables*,
         and each type variable appears at most once in the instance head.
         Use FlexibleInstances if you want to disable this.)
    • In the instance declaration for ‘Concurrent (Kleisli IO)’
cabal: Leaving directory '/tmp/cabal-tmp-7363/reactivity-0.3.2.0'
cabal: Error: some packages failed to install:
reactivity-0.3.2.0 failed during the building phase. The exception was:
ExitFailure 1