Resolving dependencies...
Configuring wtk-0.2.1...
Building wtk-0.2.1...
Preprocessing library wtk-0.2.1...
[1 of 4] Compiling Text.PrettyShow  ( Text/PrettyShow.hs, dist/build/Text/PrettyShow.o )
[2 of 4] Compiling Text.WtkParser   ( Text/WtkParser.hs, dist/build/Text/WtkParser.o )

Text/WtkParser.hs:36:10: Warning:
    ‘Parser’ is an instance of Monad but not Applicative - this will become an error in GHC 7.10, under the Applicative-Monad Proposal.

Text/WtkParser.hs:46:10: Warning:
    ‘Parser’ is an instance of MonadPlus but not Alternative - this will become an error in GHC 7.10, under the Applicative-Monad Proposal.
[3 of 4] Compiling Text.Calculator  ( Text/Calculator.hs, dist/build/Text/Calculator.o )
[4 of 4] Compiling Text.ReadEither  ( Text/ReadEither.hs, dist/build/Text/ReadEither.o )
In-place registering wtk-0.2.1...
Running Haddock for wtk-0.2.1...
Running hscolour for wtk-0.2.1...
Preprocessing library wtk-0.2.1...
HsColour: Text/PrettyShow.hs: hGetContents: invalid argument (invalid byte sequence)
Creating package registration file: /tmp/pkgConf-wtk-0.227335.1
Installing library in
/home/builder/hackage-server/build-cache/tmp-install/lib/x86_64-linux-ghc-7.8.3/wtk-0.2.1
Registering wtk-0.2.1...
Installed wtk-0.2.1