--- a/rtl-sdr-0.5.3.ebuild	2014-07-07 00:22:19.000000000 +0300
+++ b/rtl-sdr-0.5.3.ebuild	2014-07-15 17:42:56.338317140 +0300
@@ -4,7 +4,7 @@
 
 EAPI=5
 
-inherit autotools
+inherit cmake-utils autotools
 
 DESCRIPTION="turns your Realtek RTL2832 based DVB dongle into a SDR receiver"
 HOMEPAGE="http://sdr.osmocom.org/trac/wiki/rtl-sdr"
@@ -21,7 +21,7 @@ fi
 
 LICENSE="GPL-2"
 SLOT="0"
-IUSE=""
+IUSE="detach_kernel_driver"
 
 RDEPEND="virtual/libusb:1"
 DEPEND="${RDEPEND}"
@@ -40,6 +40,14 @@ src_prepare() {
 	eautoreconf
 }
 
+src_configure() {
+	local mycmakeargs=(-DDETACH_KERNEL_DRIVER=ON)
+	if detach_kernel_driver ; then
+		mycmakeargs=(-DDETACH_KERNEL_DRIVER=ON)
+	fi
+	cmake-utils_src_configure
+}
+
 pkg_postinst() {
 	local rulesfiles=( "${EPREFIX}"/etc/udev/rules.d/*${PN}.rules )
 	if [[ ! -f ${rulesfiles} ]]; then