Comment # 7 on bug 1162014 from Adam Majer

The incompatibilities in fakeroot seem to be started with libcap commit

commit b2b267ef1c83f1f3d3105a4bb84f8bebbc130dec
Author: Andrew G. Morgan <morgan@kernel.org>
Date:   Sat Nov 30 18:33:42 2019 -0800

    Add support to libcap for overriding system call functions.

It's not really possible to simply revert this change so fakeroot will have to
be adapted.