Local pbuilder installs files into ${HOME}/perl5/

Hi folks,

since some time my local pbuilder installs in the resulting *.deb files
into ${HOME}/perl5.  I'm not really sure when this started in any case
its *only* for Perl packages and *only* in my local pbuilder.  Salsa CI
builds are fine and source-only uploads as well - even a simple debuild
in the local machine works well.  Can any user of pbuilder confirm this
problem or what I can do against this?

Kind regards
    Andreas.

PS: It would be nice to keep me in CC since I'm not subscribed.