Resolving dependencies...
Configuring ansi-terminal-0.6.2.3...
Configuring call-stack-0.1.0...
Building call-stack-0.1.0...
Building ansi-terminal-0.6.2.3...
Installed call-stack-0.1.0
Configuring mtl-2.2.1...
Building mtl-2.2.1...
Configuring old-locale-1.0.0.7...
Installed ansi-terminal-0.6.2.3
Building old-locale-1.0.0.7...
Configuring random-1.1...
Installed old-locale-1.0.0.7
Building random-1.1...
Configuring network-2.6.3.1...
Installed mtl-2.2.1
Configuring HUnit-1.5.0.0...
Installed random-1.1
Building network-2.6.3.1...
Building HUnit-1.5.0.0...
Configuring text-1.2.2.1...
Installed HUnit-1.5.0.0
Building text-1.2.2.1...
Installed network-2.6.3.1
Configuring regex-base-0.93.2...
Building regex-base-0.93.2...
Configuring old-time-1.1.0.3...
Installed regex-base-0.93.2
Building old-time-1.1.0.3...
Configuring hslogger-1.2.10...
Installed old-time-1.1.0.3
Building hslogger-1.2.10...
Installed text-1.2.2.1
Configuring regex-posix-0.95.2...
Building regex-posix-0.95.2...
Configuring parsec-3.1.11...
Installed hslogger-1.2.10
Building parsec-3.1.11...
Installed regex-posix-0.95.2
Configuring regex-compat-0.95.1...
Building regex-compat-0.95.1...
Installed regex-compat-0.95.1
Installed parsec-3.1.11
Configuring MissingH-1.4.0.1...
Building MissingH-1.4.0.1...
Installed MissingH-1.4.0.1
Configuring ftphs-1.0.9.1...
Building ftphs-1.0.9.1...
Installed ftphs-1.0.9.1
Configuring FTPLine-1.0.0...
Building FTPLine-1.0.0...
Failed to install FTPLine-1.0.0
Build log ( /home/builder/.cabal/logs/FTPLine-1.0.0.log ):
cabal: Entering directory '/tmp/cabal-tmp-22253/FTPLine-1.0.0'
Configuring FTPLine-1.0.0...
Building FTPLine-1.0.0...
Preprocessing executable 'FTPLine' for FTPLine-1.0.0...
[1 of 1] Compiling Main             ( Main.hs, dist/build/FTPLine/FTPLine-tmp/Main.o )

Main.hs:309:10: error:
    Duplicate instance declarations:
      instance Read PortNumber -- Defined at Main.hs:309:10
      instance Read PortNumber
        -- Defined in ‘network-2.6.3.1:Network.Socket.Types’
cabal: Leaving directory '/tmp/cabal-tmp-22253/FTPLine-1.0.0'
cabal: Error: some packages failed to install:
FTPLine-1.0.0 failed during the building phase. The exception was:
ExitFailure 1