cabal: cannot configure Crypto-4.2.1. It requires QuickCheck >=2
For the dependency on QuickCheck >=2 there are these packages: QuickCheck-2.1,
QuickCheck-2.1.0.1, QuickCheck-2.1.0.2 and QuickCheck-2.1.0.3. However none of
them are available.
QuickCheck-2.1 was excluded because happstack-util-0.3.2 requires QuickCheck
<2
QuickCheck-2.1.0.1 was excluded because happstack-util-0.3.2 requires
QuickCheck <2
QuickCheck-2.1.0.2 was excluded because happstack-util-0.3.2 requires
QuickCheck <2
QuickCheck-2.1.0.3 was excluded because happstack-util-0.3.2 requires
QuickCheck <2