--- akonadi-server-1.12.1.ebuild	2014-04-18 20:34:18.320105383 +0200
+++ akonadi-server-1.12.1.ebuild	2014-04-18 20:35:08.970105719 +0200
@@ -22,13 +22,13 @@
 
 LICENSE="LGPL-2.1"
 SLOT="0"
-IUSE="+mysql postgres +qt4 qt5 sqlite test"
+IUSE="+mysql postgres +qt4 qt5 sqlite test +soprano"
 
 REQUIRED_USE="^^ ( qt4 qt5 ) || ( sqlite mysql postgres )"
 
 CDEPEND="
 	dev-libs/boost:=
-	>=dev-libs/soprano-2.6.51
+	soprano? ( >=dev-libs/soprano-2.6.51 )
 	x11-misc/shared-mime-info
 	qt4? (
 		>=dev-qt/qtcore-4.8.5:4
@@ -91,11 +91,14 @@
 }
 
 src_configure() {
+	epatch $FILESDIR/soprano-optional.patch || die
+
 	local mycmakeargs=(
 		-DINSTALL_QSQLITE_IN_QT_PREFIX=ON
 		$(cmake-utils_use test AKONADI_BUILD_TESTS)
 		$(cmake-utils_use sqlite AKONADI_BUILD_QSQLITE)
 		$(cmake-utils_use qt5 QT5_BUILD)
+		$(cmake-utils_USE soprano WITH_SOPRANO)
 	)
 
 	cmake-utils_src_configure