This not only breaks reproducible builds but also is useless, as the
build dir might change from submodule to submodule, and it might have a
random path on it.
Bootstrapping the docs packages
-------------------------------
In order to generate documentation for Qt, qdoc and
qtattributionsscanner is needed. Thus you need to do
the following steps if you want to rebuild the Qt stack:
* Build only arch-dependent packages from these sources:
- qt6-base
- qt6-declarative
- qt6-tools
* Build the arch-independent packages (-doc and -doc-html) of the above sources.
* Build the rest of the Qt stack in the usual way.
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