Some libraries, tests, and benchmarks which were previously blocked appear to build successfully with GHC 8.0 when I tested them. They are: * `ad` (the doctests run as of [`4.3.2.1`](http://hackage.haskell.org/package/ad-4.3.2.1)) * `lifted-base` (the benchmarks compile as of [`0.2.3.7`](http://hackage.haskell.org/package/lifted-base-0.2.3.7)) * `postgresql-binary` (the library and benchmarks—but not the tests, due to #1691—compile as of [`0.9.0.1`](http://hackage.haskell.org/package/postgresql-binary-0.9.0.1)) * `rethinkdb` (the benchmarks compile as of [`2.2.0.6`](http://hackage.haskell.org/package/rethinkdb-2.2.0.6)) * `simple-sendfile` (the [issue](https://github.com/kazu-yamamoto/simple-sendfile/pull/10) blocking it has long been fixed)