Mac has just been uploaded. Linux build will follow this week. Thanks for your patience!
Generally, from the devs perspective, it's the support of all builds across all systems that causes the delays here. Every build on every store needs to be adequately tested, one at a time, before we publish it; and we'll understandably prioritize the builds/stores that get the most users.
Meanwhile, since the GOG linux build is currently being patched, we're waiting 'til that's stable before adding it here.