On Wed, Oct 05, 2016 at 11:22:21AM -0400, Lennart Sorensen wrote: > The last time this happened (in May I believe) someone pointed at this: > https://ghc.haskell.org/trac/ghc/ticket/12070 > So if that is the issue, it appears to be fixed in ghc upstream in > version 8, while the build was using 7.10.3. Thanks, this appears to have fixed the problem.