hg update
cd $DEBBUILDPATH/tmp/debian_package_build_root/deb_lppserial/
rm -R lppserial-1.0
cp -R lppserial-1.0.orig  lppserial-1.0
diff  lppserial-1.0 $HGREPOPATH/lppserial > lppserial_1.0.diff
patch -p0 lppserial-1.0 < lppserial_1.0.diff