Is there a way to use something like "inherit flag-o-matic" in 
environment files inside /etc/portage/env?  My specific need here is:

/etc/portage/env/media-libs/libcaca:
inherit flag-o-matic # Doesn't work
pre_pkg_setup() {
	elog "env is removing -floop-block CFLAG"
	filter-flags -floop-block
}