[Haskell-cafe] (re)newcomer

[Matthew Fairtlough]

Hello Haskell-cafers,

I used to teach Haskell (and Clean!) at University level but haven't 
touched Haskell in years and certainly never used it with a Mac.  Now I 
work in publishing and want to experiment with Haskell's web services 
and see if I can help set up an open-source system for handling ONIX xml 
data.

So I tried to install happstack-server (among several other things) and 
this depends on unix but cabal can't install unix.  Error and 
diagnostics below as best as I could see to report them.  Any 
tips/pointers much appreciated; I'm not sure if this is a bug or where 
to report it if it is one...

thanks for any help. Matthew.

bash-3.2# cabal install unix
Resolving dependencies...
cabal: cannot configure unix-2.4.1.0. It requires base >=4.2 && <4.4
For the dependency on base >=4.2 && <4.4 there are these packages:
base-4.2.0.0, base-4.2.0.1, base-4.2.0.2 and base-4.3.0.0. However none of
them are available.
base-4.2.0.0 was excluded because of the top level dependency base -any
base-4.2.0.1 was excluded because of the top level dependency base -any
base-4.2.0.2 was excluded because of the top level dependency base -any
base-4.3.0.0 was excluded because of the top level dependency base -any

bash-3.2# uname -a
Darwin Matthew-Fairtloughs-MacBook-Pro.local 10.5.0 Darwin Kernel 
Version 10.5.0: Fri Nov  5 23:20:39 PDT 2010; 
root:xnu-1504.9.17~1/RELEASE_I386 i386
bash-3.2# port version
Version: 1.9.2
bash-3.2# port info haskell-platform
haskell-platform @2009.2.0.2 (devel, haskell)

Description:          This is the the Haskell Platform: a single, standard
                       Haskell distribution for every system. The Haskell
                       Platform is a blessed library and tool suite for 
Haskell
                       distilled from Hackage.
Homepage:             http://hackage.haskell.org/platform/

Runtime Dependencies: ghc, hs-platform-cgi, hs-platform-fgl,
                       hs-platform-editline, hs-platform-GLUT,
                       hs-platform-haskell-src, hs-platform-html,
                       hs-platform-HUnit, hs-platform-mtl, 
hs-platform-network,
                       hs-platform-OpenGL, hs-platform-parallel,
                       hs-platform-parsec, hs-platform-QuickCheck,
                       hs-platform-regex-base, hs-platform-regex-compat,
                       hs-platform-regex-posix, hs-platform-stm,
                       hs-platform-time, hs-platform-xhtml, 
hs-platform-zlib,
                       hs-platform-HTTP, hs-platform-alex, 
hs-platform-happy,
                       hs-platform-cabal
Platforms:            darwin
License:              unknown
Maintainers:          gwright at macports.org
bash-3.2# cabal -V
cabal-install version 0.6.2
using version 1.6.0.3 of the Cabal library
bash-3.2# cabal info base
* base             (library)
     Synopsis:      Basic libraries
     Latest version available: 4.3.0.0
     Latest version installed: 4.1.0.0
     Homepage:      [ Not specified ]
     Bug reports:   
http://hackage.haskell.org/trac/ghc/newticket?component=libraries/base
     Description:   This package contains the Prelude and its support 
libraries,
                    and a large collection of useful libraries ranging 
from data
                    structures to parsing combinators and debugging 
utilities.
     License:       BSD3
     Maintainer:    libraries at haskell.org
     Source repo:   http://darcs.haskell.org/packages/base/
     Flags:         integer-simple
     Dependencies:  rts -any, ghc-prim -any, integer-simple -any,
                    integer-gmp -any
     Documentation: /opt/local/share/ghc-6.10.4/doc/ghc/libraries/base
     Cached:        No
     Modules:
<long list elided>