This is used in `hack/make.sh` for detecting various dependencies such as `libsystemd-journal` -- without this, our packages don't support pulling logs back out of journald. 😢 Signed-off-by: Andrew "Tianon" Page <admwiggin@gmail.com> Upstream-commit: 9ac671f79e46ac3e05cc9531739d8f39d8da34c7 Component: engine