--- /usr/portage/games-simulation/flightgear/flightgear-2017.3.1.ebuild	2017-10-20 00:45:35.000000000 +0200
+++ games-simulation/flightgear/flightgear-2017.3.1.ebuild	2018-03-14 14:25:34.099766934 +0100
@@ -12,7 +12,7 @@ SRC_URI="mirror://sourceforge/flightgear
 LICENSE="GPL-2"
 KEYWORDS="~amd64 ~x86"
 SLOT="0"
-IUSE="dbus debug examples gdal openmp qt5 test +udev +utils vim-syntax"
+IUSE="dbus debug examples flite gdal openmp qt5 test +udev +utils vim-syntax"
 
 # zlib is some strange auto-dep from simgear
 COMMON_DEPEND="
@@ -28,6 +28,8 @@ COMMON_DEPEND="
 	x11-libs/libX11
 	dbus? ( >=sys-apps/dbus-1.6.18-r1 )
 	gdal? ( >=sci-libs/gdal-2.0.0:0 )
+	flite? ( app-accessibility/flite
+			 app-accessibility/htsengine[static-libs] )
 	qt5? (
 		>=dev-qt/qtcore-5.4.1:5
 		>=dev-qt/qtdeclarative-5.4.1:5
@@ -72,7 +74,7 @@ src_configure() {
 		-DENABLE_FGJS=$(usex utils)
 		-DENABLE_FGQCANVAS=$(usex qt5 && usex utils)
 		-DENABLE_FGVIEWER=$(usex utils)
-		-DENABLE_FLITE=OFF
+		-DENABLE_FLITE=$(usex flite)
 		-DENABLE_GDAL=$(usex gdal)
 		-DENABLE_GPSSMOOTH=$(usex utils)
 		-DENABLE_JS_DEMO=$(usex utils)