fmit fails to cross build from source. It is lrelease that fails for the
lack of a linux-g++ spec file. For having this file, lrelease needs a
native qmake6. This can be achieved by adding qmake6:native to
Build-Depends. I'm attaching a patch.

I am wondering though whether this should really be a responsibility of
the individual package rather than say qt6-l10n-tools. If qt6-l10n-tools
were to "Depends: qmake6", then this problem would not reappear
repeatedly in several packages. What do you think?

Helmut