I thought you knew that FreeBSD was not a supported architecture for 9.6. GHC developers don’t have the capacity to fix it. I know this is likely to trigger more hard feelings, but somehow we need to reach an understanding that FreeBSD is not supported for 9.6, 9.8, 9.10, and 9.12 because of a lack of resources. There is no alternative. This has simply already happened. It’s history.
Your refusal of this reality frustrates me because your GHCup defaults negatively effect adoption of new versions of GHC. This makes it likely that bugs are going uncaught, and it wastes GHC developer time: the amortized cost of a release goes up if fewer people use it.
What will it take to move past this impasse?