Hi Maxime, > Ninja fails when pyelftools is not installed. > Shouldn't meson detect and report it before build time? Will add in v7. Meson 0.51 introduced a terse way to check for Python dependencies, but it's not hard even with Meson 0.47.1. https://github.com/mesonbuild/meson/issues/3551#issuecomment-518320640