wip/hs-zlib build errors

[Mayuresh <mayuresh%acm.org@localhost>]

Trying to fork archivers/hs-zlib in wip/hs-zlib (not committed), in order
to build it with wip/ghc.

(Stems from an attempt to upgrade wip/pandoc which requires ghc 7.10 which
is met by wip/ghc.)

Getting several errors of the following kind:

Codec/Compression/GZip.hs:1:1:
    Could not find module `Prelude'
    Perhaps you haven't installed the profiling libraries for package
`base-4.8.1.0'?
    Use -v to see a list of the files searched for.

Codec/Compression/GZip.hs:69:8:
    Could not find module `Data.ByteString.Lazy'
    Perhaps you haven't installed the profiling libraries for package
`bytestring-0.10.6.0@bytes_6elQVSg5cWdFrvRnfxTUrH'?
    Use -v to see a list of the files searched for.

...


I can see the profiling option enabled in wip/mk/haskell.mk and can also
confirm it as:

#make show-var VARNAME=HASKELL_ENABLE_LIBRARY_PROFILING
yes


Not sure how to interpret above errors. Please advise.

Mayuresh