Resolving dependencies...
Configuring network-2.6.3.1...
Building network-2.6.3.1...
Installed network-2.6.3.1
Configuring splice-0.6.1.1...
Building splice-0.6.1.1...
Installed splice-0.6.1.1
Configuring PortFusion-1.2.0...
Building PortFusion-1.2.0...
Failed to install PortFusion-1.2.0
Build log ( /home/builder/.cabal/logs/PortFusion-1.2.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-6220/PortFusion-1.2.0'
Configuring PortFusion-1.2.0...
Building PortFusion-1.2.0...
Preprocessing executable 'PortFusion' for PortFusion-1.2.0...
[1 of 1] Compiling Main             ( src/Main.hs, dist/build/PortFusion/PortFusion-tmp/Main.o )

src/Main.hs:139:10: error:
    Duplicate instance declarations:
      instance Read Port -- Defined at src/Main.hs:139:10
      instance Read PortNumber
        -- Defined in ‘network-2.6.3.1:Network.Socket.Types’
cabal: Leaving directory '/tmp/cabal-tmp-6220/PortFusion-1.2.0'
cabal: Error: some packages failed to install:
PortFusion-1.2.0 failed during the building phase. The exception was:
ExitFailure 1