[arch-haskell] Cabal2arch not building off yaourt: no 'readPackageDescription' found

[Leif Warner]

It fails with:
./Main.hs:97:16: Not in scope: `readPackageDescription'

I have the AUR package haskell-cabal 1.6.0.1-2 installed.
What other info would be noteworthy?
-Leif Warner
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