/usr/lib/x86_64-linux-gnu/pkgconfig/vapigen.pc is in valac 0.30.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/pkgconfig/vapigen-0.30.pc
/usr/lib/x86_64-linux-gnu/pkgconfig/vapigen-0.30.pc