It seems to be caused by the latest release, 7.3.1-2, and its change in how icu is detected. Reverting both that change and the change in icu to not ship icu-config and rebuilding makes the issue go away again.
It seems to be caused by the latest release, 7.3.1-2, and its change in how icu is detected. Reverting both that change and the change in icu to not ship icu-config and rebuilding makes the issue go away again.