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-132722.1
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 hinvaders-0.1...
Configuring hinvaders-0.1...
Building hinvaders-0.1...
Preprocessing executable 'hinvaders' for hinvaders-0.1...

src/Main.hs:1:1:
    Ambiguous module name ‘Prelude’:
      it was found in multiple packages: base haskell98-2.0.0.3
Failed to install hinvaders-0.1
cabal: Error: some packages failed to install:
hinvaders-0.1 failed during the building phase. The exception was:
ExitFailure 1