I've spent a bit of time trying to setup a yesod app under nginx using fastcgi. The server config looks a little like this (statics get served by nginx which is nice) server { listen 80; server_name domain.com; access_log # error_log # location ~ ^/s/.* { root /path/to/static/static; } location ~ ^/ { include /etc/nginx/fastcgi_params; fastcgi_pass http://127.0.0.1:3000; } } unfortunately I couldn't get the wai-handler-fastcgi package to run properly. Server: user error (FCGX_Accept failed with error code: -88) I couldn't find error code -88 easily and I am guessing that I need to set a particular port for the app to run on, unfortunately I didn't see any way to do this through the wai api? (it does appear the wai-handler-snap's run function takes an Int...) I'm just a little confused at the moment. Regards, Mark