I may confirm that this workflow helped:
$ apt-get source libpango1.0-0/testing
$ cd pango1.0-1.40.3
$ # solve the dependency on newer version of libthai
$ dpkg-buildpackage -b -uc -d # "-d" because of the dependency on debhelper>=10
$ sudo dpkg -i ~user/{libpango,gir}*.deb # needed BEFORE building inkscape
package!
$ cd ; apt-get source inkscape/jessie-backports
$ cd inkscape-0.92.0
$ vim debian/control # fix the dependency on libpango1.0 >= 1.37.1
$ dpkg-buildpackage -b -uc -d # again, "-d" because of the dependency on
debhelper>=10
$ # make a coffee or buy a faster machine than I have
$ sudo dpkg -i ~user/inkscape*.deb
$ # be happy with the test document, for example font features work now
