[Haskell-cafe] Curious why "cabal upgrade parsec" not installing latest version

Not that I'm having any problem with parsec 2.1.0.1, but I guess I would like to install the latest (3.1.0), unless there is a reason not to. I can't seem to get Cabal to do so; thanks in advance for any help. I don't understand part of the output from "cabal install --dry-run --reinstall -v parsec" at the end below, which includes: "selecting parsec-2.1.0.1 (hackage) and discarding parsec-2.0, 2.1.0.0, 3.0.0, 3.0.1 and 3.1.0". (http://hackage.haskell.org/package/parsec seems to point to 3.1.0.) Under Windows XP:

H:\proc\dev\cmd>cabal update Downloading the latest package list from hackage.haskell.org

H:\proc\dev\cmd>cabal info parsec * parsec (library) Synopsis: Monadic parser combinators Latest version available: 3.1.0 Latest version installed: 2.1.0.1 Homepage: http://www.cs.uu.nl/~daan/parsec.html Bug reports: [ Not specified ] Description: Parsec is designed from scratch as an industrial-strength parser library. It is simple, safe, well documented (on the package homepage), has extensive libraries and good error messages, and is also fast. It is defined as a monad transformer that can be stacked on arbitrary monads, and it is also parametric in the input stream type. Category: Parsing License: BSD3 Author: Daan Leijen , Paolo Martini Maintainer: Derek Elkins Source repo: [ Not specified ] Flags: base4 Dependencies: mtl -any, bytestring -any, base >=4 && <5, syb -any, base >=3.0.3 && <4 Documentation: [ Not installed ] Cached: No Modules: Text.ParserCombinators.Parsec Text.ParserCombinators.Parsec.Char Text.ParserCombinators.Parsec.Combinator Text.ParserCombinators.Parsec.Error Text.ParserCombinators.Parsec.Expr Text.ParserCombinators.Parsec.Language Text.ParserCombinators.Parsec.Perm Text.ParserCombinators.Parsec.Pos Text.ParserCombinators.Parsec.Prim Text.ParserCombinators.Parsec.Token

H:\proc\dev\cmd>cabal upgrade parsec Resolving dependencies... No packages to be installed. All the requested packages are already installed. If you want to reinstall anyway then use the --reinstall flag.

H:\proc\dev\cmd>cabal install --dry-run --reinstall parsec Resolving dependencies... In order, the following would be installed (use -v for more details): parsec-2.1.0.1

H:\proc\dev\cmd>cabal install --dry-run --reinstall -v parsec H:\proc\tools\Haskell Platform\2010.1.0.0\bin\ghc.exe --numeric-version looking for package tool: ghc-pkg near compiler in H:\proc\tools\Haskell Platform\2010.1.0.0\bin found package tool in H:\proc\tools\Haskell Platform\2010.1.0.0\bin\ghc-pkg.exe H:\proc\tools\Haskell Platform\2010.1.0.0\bin\ghc-pkg.exe --version H:\proc\tools\Haskell Platform\2010.1.0.0\bin\ghc.exe --supported-languages Reading installed packages... H:\proc\tools\Haskell Platform\2010.1.0.0\bin\ghc-pkg.exe dump --global H:\proc\tools\Haskell Platform\2010.1.0.0\bin\ghc-pkg.exe dump --user Reading available packages... Resolving dependencies... selecting parsec-2.1.0.1 (hackage) and discarding parsec-2.0, 2.1.0.0, 3.0.0, 3.0.1 and 3.1.0 selecting base-3.0.3.2 (installed) and 4.2.0.0 (installed) and discarding syb-0.1.0.0, 0.1.0.1, 0.1.0.2, 0.1.0.3, 0.2 and 0.2.1 selecting ffi-1.0 (installed) selecting ghc-prim-0.2.0.0 (installed) selecting integer-gmp-0.2.0.0 (installed) selecting rts-1.0 (installed) selecting syb-0.1.0.2 (installed) In order, the following would be installed: parsec-2.1.0.1 (reinstall) changes: base-4.2.0.0 -> 3.0.3.2

H:\proc\dev\cmd>

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