Resolving dependencies...
[1 of 1] Compiling Main             ( /tmp/cabal-tmp-10732/nano-md5-0.1/dist/setup/setup.hs, /tmp/cabal-tmp-10732/nano-md5-0.1/dist/setup/Main.o )
Linking /tmp/cabal-tmp-10732/nano-md5-0.1/dist/setup/setup ...
Configuring nano-md5-0.1...
Warning: No 'build-type' specified. If you do not need a custom Setup.hs or
./configure script then use 'build-type: Simple'.
Building nano-md5-0.1...
Preprocessing library nano-md5-0.1...

<no location info>: 
Failing due to -Werror.

on the commandline: Warning:
    The -fvia-C flag does nothing; it will be removed in a future GHC release
Failed to install nano-md5-0.1
cabal: Error: some packages failed to install:
nano-md5-0.1 failed during the building phase. The exception was:
ExitFailure 1