Package: src:qgis Version: 3.4.12+dfsg-2qgis b-d on python3-all-dev, but doesn't build for all supported python versions, so either change the b-d or build for all supported python3 versions.
- Bug#943492: qgis b-d on python3-all-dev, but doesn't... Matthias Klose
- Bug#943492: qgis b-d on python3-all-dev, but do... Sebastiaan Couwenberg
