fix shairport optional configure options

media-sound/shairport-sync/shairport-sync-2.8.4.1.ebuild

@@ -11,7 +11,7 @@ SRC_URI="https://github.com/mikebrady/${PN}/archive/${PV}.tar.gz"
 
 LICENSE="MIT"
 SLOT="0"
-KEYWORDS="~amd64 ~x86"
+KEYWORDS="amd64 ~x86"
 IUSE="avahi soxr"
 
 DEPEND="dev-libs/openssl
@@ -33,16 +33,14 @@ src_prepare() {
 }
 
 src_configure() {
-	econf \
-		$(use_with avahi) \
-		$(use_with soxr) \
+	local myconf
+	if use avahi ; then
+		myconf+=" --with-avahi"
+	fi
+	if use soxr ; then
+		myconf+=" --with-soxr"
+	fi
+	econf ${myconf} \
 		--with-ssl=openssl \
 		--with-alsa
 }
-
-#src_install() {
-#	dobin shairport
-#	dodoc README.md
-#	newconfd "${FILESDIR}"/${PN}.confd ${PN}
-#	newinitd "${FILESDIR}"/${PN}.initd ${PN}
-#}