Mine

--- /usr/portage/app-forensics/openscap/openscap-0.8.0.ebuild	2011-12-26 15:30:28.000000000 +0100
+++ openscap-0.8.0.ebuild	2011-12-28 10:51:27.000000000 +0100
@@ -15,11 +15,12 @@
 LICENSE="LGPL-2.1"
 SLOT="0"
 KEYWORDS="~amd64 ~x86"
-IUSE="bash-completion doc nss perl python sql"
+IUSE="bash-completion doc nss perl python rpm sql"
 RESTRICT="test"
 
 RDEPEND="!nss? ( dev-libs/libgcrypt )
 	nss? ( dev-libs/nss )
+	rpm? ( >=app-arch/rpm-4.9 )
 	sql? ( dev-db/opendbx )
 	dev-libs/libpcre
 	dev-libs/libxml2
@@ -34,6 +35,18 @@
 	python_pkg_setup
 }
 
+src_prepare() {
+	sed -i 's/uname -p/uname -m/' tests/probes/uname/test_probes_uname.xml.sh || die
+	sed -i 's,/etc/rc.d/init.d,/etc/init.d,' src/OVAL/probes/unix/runlevel.c || die
+	if ! use rpm ; then
+		sed -i 's,probe_rpminfo_req_deps_ok=yes,probe_rpminfo_req_deps_ok=no,' configure || die
+		sed -i 's,probe_rpminfo_opt_deps_ok=yes,probe_rpminfo_opt_deps_ok=no,' configure || die
+		sed -i 's,probe_rpmverify_req_deps_ok=yes,probe_rpmverify_req_deps_ok=no,' configure || die
+		sed -i 's,probe_rpmverify_opt_deps_ok=yes,probe_rpmverify_opt_deps_ok=no,' configure || die
+		sed -i 's,^probe_rpm.*_deps_missing=,&disabled by USE flag,' configure || die
+	fi
+}
+
 src_configure() {
 	local myconf
 	if use python || use perl ; then