Current build artefacts are for GTK3. GTK4 artefacts would be needed at least for Ephy Canary very soon. Also the generated zip files include duplicate lib files currently, a bug in the script, most likely...
Pull request: https://github.com/WebKit/WebKit/pull/14743
Committed 265371@main (2c6e61e65f21): <https://commits.webkit.org/265371@main> Reviewed commits have been landed. Closing PR #14743 and removing active labels.
<rdar://problem/111119140>
> The factory doesn't need to upload the archive as it will be made > available in a side channel. What side channel, exactly?
See also https://bugs.webkit.org/show_bug.cgi?id=258472