Thank you, Kiwamu.
I was trying to run Yampa. I see that many other features are not
supported, for instance, multi-parametric type classes. (This is no
criticism, it's just that I also tried AFRP, a previous version of
Yampa that did not use GADTs. I'm very happy to be able to run Haskell
on Android as it is.)
Is there a web page where a clear list of supported features is
maintained? This would be useful (I think).
Regards
Ivan