Hi there. I was able to get dev-libs/ossp-uuid to build and install correctly by changing the econf line's --includedir option to include ${EROOT} before the path. I'm building postgresql-base against it now, looks ok. Reproducible: Always
Sorry I just reread the techdocs, looks like that should have been ${EPREFIX} not ${EROOT}, but (probably) no harm either way.
added, thx