The next alpha is released (https://mail.haskell.org/pipermail/ghc-devs/2019-November/018337.html).

For the last two ghc released I have tried to prepare for the next GHC release ahead of time by using head.hackage or whatsitcalled. Because getting that to work has proven to be a sink of my time, this time around I plan not to start working on making brittany compatible until the dependencies work with the new GHC version (excluding the dependencies from me, of course, i.e. multistate/butcher/czipwith/data-tree-print).

This may delay a release that is compatible with ghc-8.10 a bit (but we'll keep making releases with new features until then).

You are very welcome to

• Give feedback on this;
• Mention any new syntactical constructs in 8.10 that you would like to be supported by brittany;
• Friendly poke dependency maintainers about making compatible releases;
• Remind me about this once dependencies are working.

Thank you for your understanding, have a nice day!