ebuild_hook() {
	local \
		x \
		fname=ubuntu-versionator_pkg_postinst

	if ! declare -F ${fname} 1>/dev/null; then
		x="${REPO_ROOT}"/eclass/ubuntu-versionator.eclass
		[[ -f ${x} ]] \
			|| die "${x}: file not found"
		source <(awk "/^${fname}\() {\$/ { p = 1 } p { print } /^}\$/ { p = 0 }" ${x} 2>/dev/null)
		declare -F ${fname} 1>/dev/null \
			|| die "${fname}: function not found"
	fi

	${fname}
}