x11-toolkits/qt5-declarative Project ERROR

[Janos Dohanics]

Hello and apologies for the cross-posting.

Trying to build x11-toolkits/qt5-declarative and encountering the error:

Project ERROR: Unknown module(s) in QT: qmltest-private
*** Error code 3

The system is FreeBSD 11.4-STABLE amd64 1104511

I have posted the problem with details to the FreeBSD ports list, but
have not received a suggestion which would help me resolve the problem:

https://lists.freebsd.org/archives/freebsd-ports/2021-October/000785.html

Your advice will be much appreciated!

-- 
Janos Dohanics