this patch is required too: http://launchpadlibrarian.net/466557663/libgnatcoll-bindings_19-1ubuntu1_19-1ubuntu2.diff.gz
- Bug#952549: please use python2 explicitly if Python2 is sti... Matthias Klose
- Bug#952549: one more patch Matthias Klose
- Bug#952549: second patch is missing Matthias Klose