Hi,

when building an arch:all package with --binary-indep, the entire package
is built normally, and the outputs are then discarded.

Since this is a massive package that takes several hours even on modern
hardware, this is rather wasteful -- for reference, the arch:all
autobuilder spends about three hours[1] on this package.

   Simon

[1] https://buildd.debian.org/status/fetch.php?pkg=qt6-webengine&arch=all&ver=6.10.2%2Bdfsg-3&stamp=1773983430&raw=0