Resolving dependencies...
Downloading fitsio-0.1...
[1 of 1] Compiling Main             ( /tmp/fitsio-0.1-28722/fitsio-0.1/Setup.lhs, /tmp/fitsio-0.1-28722/fitsio-0.1/dist/setup/Main.o )
Linking /tmp/fitsio-0.1-28722/fitsio-0.1/dist/setup/setup ...
Configuring fitsio-0.1...
Warning: No 'build-type' specified. If you do not need a custom Setup.hs or
./configure script then use 'build-type: Simple'.
Warning: Instead of 'ghc-options: -ffi' use 'extensions:
ForeignFunctionInterface'
Warning: Instead of 'ghc-options: -lcfitsio' use 'extra-libraries: cfitsio'
Building fitsio-0.1...
Preprocessing library fitsio-0.1...

on the commandline: Warning:
    -ffi is deprecated: use -XForeignFunctionInterface or pragma {-# LANGUAGE ForeignFunctionInterface #-} instead

src/FitsIO.chs:5:8:
    Could not find module `C2HS'
    Use -v to see a list of the files searched for.
Failed to install fitsio-0.1
cabal: Error: some packages failed to install:
fitsio-0.1 failed during the building phase. The exception was:
ExitFailure 1