Resolving dependencies...
Downloading scan-0.1.0.2...
Configuring scan-0.1.0.2...
Building scan-0.1.0.2...
Preprocessing executable 'scan' for scan-0.1.0.2...
[1 of 2] Compiling Language.Haskell.Scanner ( src/Language/Haskell/Scanner.hs, dist/build/scan/scan-tmp/Language/Haskell/Scanner.o )
[2 of 2] Compiling Main             ( src/scan.hs, dist/build/scan/scan-tmp/Main.o )

src/scan.hs:1:1:
    The main function `main' is not exported by module `Main'
Failed to install scan-0.1.0.2
cabal: Error: some packages failed to install:
scan-0.1.0.2 failed during the building phase. The exception was:
ExitFailure 1