https://www.zabbix.com/documentation/4.2/manual/installation/requirements I'll test out the source tarball and see if any configure options have changed, it looks like some of the software dependencies are updated...and timescaledb is now an allowed db.
Thanks
Version 4.2.1 is available,
4.2.2 is out
4.2.3 actually
4.2.4 is live
And 4.2.5 with cool bugfixes in release candidate state :)
4.2.7 in tree