Resolving dependencies...
Configuring primitive-0.6.1.0...
Configuring network-2.6.3.1...
Building primitive-0.6.1.0...
Building network-2.6.3.1...
Installed primitive-0.6.1.0
Configuring vector-0.11.0.0...
Building vector-0.11.0.0...
Installed network-2.6.3.1
Configuring splice-0.6.1.1...
Building splice-0.6.1.1...
Installed splice-0.6.1.1
Installed vector-0.11.0.0
Downloading PortFusion-1.0.3.1...
Configuring PortFusion-1.0.3.1...
Building PortFusion-1.0.3.1...
Failed to install PortFusion-1.0.3.1
Build log ( /home/builder/.cabal/logs/PortFusion-1.0.3.1.log ):
cabal: Entering directory '/tmp/cabal-tmp-5459/PortFusion-1.0.3.1'
Configuring PortFusion-1.0.3.1...
Building PortFusion-1.0.3.1...
Preprocessing executable 'PortFusion' for PortFusion-1.0.3.1...
[1 of 1] Compiling Main             ( src/Main.hs, dist/build/PortFusion/PortFusion-tmp/Main.o )

src/Main.hs:177:10: error:
    Duplicate instance declarations:
      instance Read Port -- Defined at src/Main.hs:177:10
      instance Read PortNumber
        -- Defined in ‘network-2.6.3.1:Network.Socket.Types’
cabal: Leaving directory '/tmp/cabal-tmp-5459/PortFusion-1.0.3.1'
cabal: Error: some packages failed to install:
PortFusion-1.0.3.1 failed during the building phase. The exception was:
ExitFailure 1