[Haskell-cafe] Installing Haskell on Windows 7

Stephen Tetley stephen.tetley at gmail.com
Sun Dec 27 08:09:53 EST 2009

Hi Thomas

I suspect the problem you are having is specifically with Pandoc.
Pandoc has a couple of dependencies on C libraries: network and zlib
are two - they are part of the Haskell platform so they would be
working in the first place (I have a mostly vanilla install of Haskell
platform on Windows and whilst Haddock does appear to be broken via
ghc-kpg check, the other libraries / tools are fine*). Pandoc also
depends on the zip-archive library which then depends on the digest

Digest seems to depend on C internals of the zlib library. Now, zlib
package is part Haskell platform and it includes a binary library of
(the C) zlib and the source headers, so it might be possible to build
digest by itself but you might end up needing cygwin or MinGW / msys
(I've built it just now under Cygwin).

Trying to installing digest before Pandoc is one possibility - if it
fails, at least it will show if further attempts to install Pandoc are
going to be futile.

[*] The broken packages you listed from ghc-pkg check appear to be
caused by cabal chasing the extra dependencies for Pandoc but then
failing part way through the whole installation. Some of them look
like plain Haskell packages to me (utf-8string), rather than bindings
to C libraries, so if they were installed individually I'd expect them
to work.

Best wishes


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