As per summary, the ebuild contains: sed "/^TARGET_DIR/i \GTKDOC_REBASE=/bin/true" -i gtk-doc.make on FreeBSD this is /usr/bin/true; would it be possible to use only true and let PATH do the job?
if you are sure it'll work, sure, no problem.
(In reply to comment #1) > if you are sure it'll work, sure, no problem. applied