[Haskell-cafe] Cabal try to install a package I already have

[Daniel Díaz Casanueva]

I have spent some time and, when I unregistered (with ghc-pkg unregister)
all dependencies (even indirect dependencies) I have installed since I have
the Haskell Platform, then the "cabal install ftphs" worked.

Now I feel I understand the problem, but still seems annoying.

Thanks for the pointer, Jeff. I didn't know the reason of your question,
but then I saw dependencies of network and thought: "eureka!".
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