Packages tested with cabal-test-quickcheck cannot pass on all of the required platforms: it requires that Cabal and cabal-install be on the same side of version 1.19, but a build against GHC 7.8 will tend to use Cabal-1.18 with cabal-install-1.20 or higher. As such, the library has been removed. The http-media package, which used cabal-test-quickcheck, is now expected to build its test suite and pass all tests.