Dependency version problem with Cabal

[jutaro]

In my leksah.cabal file i have the package dependency Cabal >=1.6.0.1.
When I have installed Cabal-1.6.0.2 as well a s1.6.0.1 I get the following
warning:

Warning: This package indirectly depends on multiple versions of the same
package. This is highly likely to cause a compile failure.
package ghc-6.10.1 requires Cabal-1.6.0.1
package leksah-0.4.3 requires Cabal-1.6.0.2

Why does this happen, as leksah does not require Cabal-1.6.0.2?
How can I solve this problem?

Jürgen Nicklisch-Franken
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