Sorry, yesterday the preview moved under the dune.build homepage as preview.dune.build. We’ve set up a redirect but only for the page and not for the script. It’s returning a 301 to the right location (needs curl -L or curl https://get.dune.build/install | bash) and the page has the updated instructions.
It’s all a bit in the flow at the moment as we are getting a lot of feedback and are trying to incorporate it all.