HEAD.hackage.haskell.org

These are not the cabal packages you're looking for
repository head.hackage
  url: http://head.hackage.haskell.org/
  secure: True
  root-keys: 07c59cb65787dedfaef5bd5f987ceb5f7e5ebf88b904bbd4c5cbdeb2ff71b740
             2e8555dde16ebd8df076f1a8ef13b8f14c66bad8eafefd7d9e37d0ed711821fb
             8f79fd2389ab2967354407ec852cbe73f2e8635793ac446d09461ffb99527f6e
  key-threshold: 3