Package: src:babeltrace Version: 1.2.4-1 Severity: important Tags: sid stretch patch
Please don't hard code the python version, the package will ftbfs once python3.5 is the default.
patch at http://launchpadlibrarian.net/222315354/babeltrace_1.2.4-1build1_1.2.4-1ubuntu1.diff.gz please also consider to build for all supported python3 versions.