Hi, I don't know how you update your web pages and so on, but I'd like to make a feature request (wish!) for support of all the standard haskell libraries. The couple of times I've tried using Hat this has been an issue. ST related libraries are the ones I really want. Also the first time I tried using Hat (this was about a week after I started using Haskell) I got desparately confused by its lack of library support. If I recall, I had a little bit of toy code which used Data.Queue, and tried re-installing Hat several times with different options, each time getting an erro message like "Data.Queue: Does not exist". Could you change the error message to read? Data.Queue: Does not exist; check http://<something> for a list of supported libraries. Thanks all the same for all your work! Regards, Patrick.