I'm trying to use wai-handler-devel with an application created using the yesod-0.8.0 scaffolding tool, but I'm running into some trouble. After some missing modules I symlinked some of the modiles in the 'config' folder into the root directory, but then I get a somewhat enigmatic type error that seems somewhat nonsensical: <log> Holly:Voluntrack dented42$ wai-handler-devel 3000 Controller withVTrack Attempting to interpret your app... Compile failed: Couldn't match expected type `Network.Wai.Request' with actual type `Network.Wai.Request' </log> what exactly does that mean? or rather, what should I do to prevent it? Perhaps it's trying to match the same type in two different versions of a package? Or might it be something else? Thanks, Matias Eyzaguirre