If you want to use the new version, you have to reinstall yesod or any package that want the new forms as a dependency (and it must match the version constraints), which will break projects wanting the old yesod. My biggest complaint with haskell :)

If you want a different version of yesod (and dependencies) for different projects you have to use cabal-dev. I use cabal-dev as much as possible, however it doesn't yet play well with yesod-devel or wai-handler-devel.

On Wed, Jun 15, 2011 at 3:40 PM, Michael Litchard <michael@schmong.org> wrote:

David,
I checked-out yesod-forms from the repository and see that
you've made the changes. Thank you once again. My follow-up question
is for anyone who cares to answer. How do I swap the new yesod-forms
and the old one from 0.2.0? I don't want to hose
my system. This is new ground for me.