Hi, I just got into contact with the upstream maintainer. He already proposed a patch to remove this dependency and is willing to cut a new release after we tested this. Then I'll bump the version and close the bug (via Stephan).
[1] https://github.com/purcell/airspeed/issues/59 -- Siemens AG, Linux Expert Center Otto-Hahn-Ring 6, 81739 München, Germany
