systemd isn't necessarily in the buildroot at the time that plymouth gets built, so autodetection of the unitdir from pkgconfig isn't necessarily feasible.
This commit adds a new option to configure, --with-systemdunitdir, that lets distros specify the unit directory manually.
https://bugs.gentoo.org/show_bug.cgi?id=543712
4519fe0 systemd: Allow specifying unit dir to configure
configure.ac | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
Upstream: cgit.freedesktop.org