[Haskell-cafe] Can HXT and Parsec 3 be used in the same library?

[John Millikin]

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I'm writing a library that needs to parse both plain text (with Parsec)
and XML (with HXT). HXT's .cabal file specifies that it only works with
parsec (>= 2.1 && < 3), but it still builds when I depend on parsec >=
3. It's only during "cabal install" that the following error is displayed:

- --------------------------------------------
Resolving dependencies...
cabal-1.7.3: cannot configure hxt-8.3.1. It requires parsec >=2.1 && <3
For the dependency on parsec >=2.1 && <3 there are these packages:
parsec-2.1.0.0 and parsec-2.1.0.1. However none of them are available.
parsec-2.1.0.0 was excluded because dbus-core-0.5 requires parsec >=3.0.0
parsec-2.1.0.1 was excluded because dbus-core-0.5 requires parsec >=3.0.0
- --------------------------------------------

Is there a good solution to this? I was thinking about changing my
library to use Parsec 2, but that just pushes the problem to my users,
it doesn't really solve it.
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