This year, Well-Typed is delighted to support both the GHC Contributors’ Workshop and ZuriHac.

GHC Contributors’ Workshop

The GHC Contributors’ Workshop organised by the Haskell Foundation is taking place from 7–9 June 2023. This is a great chance to learn about GHC development from the experts! In-person registration is closed, but you can participate online by registering here by 5th June.

Several of the Well-Typed team will be presenting at the event and are looking forward to welcoming you at the workshop:

  • Ben Gamari will be speaking on the GHC runtime system (RTS),
  • Duncan Coutts on how GHC interfaces with Cabal and the Haskell tooling ecosystem,
  • Sam Derbyshire on GHC’s frontend and in particular the Renamer, and
  • Zubin Duggal on Haskell Language Server.


This year’s ZuriHac will take place from 10–12 June 2023 in Rapperswil. Many of us from Well-Typed will be around over the weekend and are looking forward to catching up from Haskellers from all over the world.

As in previous years, Well-Typed are happy to offer a free training workshop at ZuriHac:

Lazy Evaluation by Andres Löh

Sunday 11 June 2023, 1200–1500 CEST

In this workshop, we are going to take a deep dive into lazy evaluation, looking at several examples and reasoning about how they get evaluated. The goal is to develop a strong understanding of how Haskell’s evaluation strategy works. Hopefully, we will see why laziness is a compelling idea with a lot of strong points, while also learning how some common sources of space leaks can be avoided.

The workshop will be accessible to anyone who has mastered the basics of Haskell and is looking to understand the language in more depth, whether they are a student or professional developer. We are not going to use any advanced features of the language, and you do not have to be a Haskell expert to attend!

This workshop will give you a glimpse of the kind of material covered on our training courses, such as our Haskell Performance and Optimization course. If you are interested in our courses or other services, check our Training page, or just send us an email.

If you cannot make it to ZuriHac, you can still check out recordings of some of our previous workshops in 2020 and 2021, or watch our new video series The Haskell Unfolder.