Just a random suggestion: If it really is just netiso/xebec
   that is the cause of the ugly code, then why not do:

	   find ${LDIRS} -type f -name '*.h' | \
		   grep -v netiso/xebec | \
		   cpio -pdvum ${DESTDIR}/usr/include

That's a good idea, though I decided to do it a little differently:

!       pax -rw -pa -L \
!           `find ${LDIRS} -type f -name '*.h' '!' -path 'netiso/xebec/*' \
!           -print` ${DESTDIR}/usr/include


------------------------------------------------------------------------------