Resolving dependencies...
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-112088.1
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
Downloading ip6addr-0.3.3...
Configuring ip6addr-0.3.3...
Building ip6addr-0.3.3...
Preprocessing executable 'ip6addrcan' for ip6addr-0.3.3...
[1 of 3] Compiling CidrSuffix       ( src/CidrSuffix.hs, dist/build/ip6addrcan/ip6addrcan-tmp/CidrSuffix.o )
[2 of 3] Compiling IPv6Addr         ( src/IPv6Addr.hs, dist/build/ip6addrcan/ip6addrcan-tmp/IPv6Addr.o )

src/IPv6Addr.hs:220:36:
    Could not deduce (Eq b) arising from a use of ‘/=’
    from the context (Num b)
      bound by the type signature for
                 firstLongestZerosRunIndex :: Num b => [(Bool, b)] -> b -> b
      at src/IPv6Addr.hs:218:30-61
    Possible fix:
      add (Eq b) to the context of
        the type signature for
          firstLongestZerosRunIndex :: Num b => [(Bool, b)] -> b -> b
    In the first argument of ‘takeWhile’, namely ‘(/= (True, y))’
    In the second argument of ‘($)’, namely
      ‘takeWhile (/= (True, y)) x’
    In the expression: sum . snd . unzip $ takeWhile (/= (True, y)) x
Failed to install ip6addr-0.3.3
cabal: Error: some packages failed to install:
ip6addr-0.3.3 failed during the building phase. The exception was:
ExitFailure 1