DDNet now offers nightly builds, built every night at 03:15 CEST of the current DDNet source code as it's available on Github:
You can use these nightly builds to try out new DDNet features before they're released and report problems and suggestions. The nightly client does not auto-update each night, instead you will get a notification when a new regular DDNet version has been released.
Update: The nightly is not being built automatically anymore. These links are only used for manual builds to debug a problem.