ukui-bluetooth uses dpkg-architecture in its preinst to compute a path
to be diverted. If the package is installed for a foreign architecture,
this will produce a wrong result. Please compute the multiarch tuple at
build time instead of doing so at runtime. Note that dh_installdeb
substitutes #DEB_HOST_MULTIARCH#. I note that the preinst script also
lacks #DEBHELPER# and thus skips any debhelper-generated maintainer
snippets

Helmut