I was upgrading happstutorial.com to ghc 6.10.1 when I came across a cabal install issue. Somewhere in day 1 (probably as a HAppS dependency), HaXml 1.13.1 got installed. On day 2, I wanted the latest version of HaXml (1.19.4), a dependency for for xml-parsec. cabal install HaXml gave me: already installed. cabal upgrade HaXml gave me: some installing action, but in the end I wound up with 1.13.1 again. cabal install HaXml-1.19.4 gave me what I want, the latest version. But even then, when I do cabal install xml-parsec I get Text/ParserCombinators/Parsec/XML.hs:18:7: Could not find module `Text.XML.HaXml.Posn': it is a member of package HaXml-1.19.4, which is hidden The cabal file has Build-Depends: base, parsec, HaXml
ghc-pkg latest HaXml says HaXml-1.19.4
Even after ghc-pkg hide HaXml-1.13.3 I get the same result, so I'm not even sure if the problems I'm having are a result of the having two versions of the same package installed. This is a bug right? Any advice on how to get xml-parsec installed? thomas.