Thank you. I upgraded my GHC and it works now. On 2018-12-03 01:06, Alexey Vagarenko wrote: > Div was introduced in GHC 8.4, I believe. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.haskell.org/pipermail/haskell-cafe/attachments/20181203/2dcd43fb/attachment.html>