If you want to make a debian package on a Raspberry Pi with Stretch installed or another machine with an older debian version installed the debhelper build process may complain about multiple runs of dh_autoreconf and abort. This is due to a bug in dh_autoreconf which just warns for this in later versions.

Solution

Get the latest version of dh_autoreconf

wget http://sourcearchive.raspbian.org/main/d/dh-autoreconf/dh-autoreconf_19.tar.xz

Unpack

tar xvf dh-autoreconf_19.tar.xz

Save a copy of the old sh_autoreconf

sudo mv /usr/bin/dh_autoreconf /usr/bin/dh_autoreconf.save

Copy the new file

copy dh_autoreconf to /usr/bin

Problem should be solved.