--- /usr/portage/x11-misc/lightdm/lightdm-1.24.0-r1.ebuild	2018-04-13 01:26:39.050078735 -0300
+++ lightdm/lightdm-1.24.0-r1.ebuild	2018-04-26 22:00:56.190011723 -0300
@@ -3,7 +3,7 @@
 
 EAPI=6
 
-inherit autotools eutils flag-o-matic pam qmake-utils readme.gentoo-r1 systemd versionator xdg-utils
+inherit autotools eutils flag-o-matic pam qmake-utils readme.gentoo-r1 systemd versionator xdg-utils vala
 
 TRUNK_VERSION="$(get_version_component_range 1-2)"
 DESCRIPTION="A lightweight display manager"
@@ -14,7 +14,7 @@
 LICENSE="GPL-3 LGPL-3"
 SLOT="0"
 KEYWORDS="~amd64 ~arm ~arm64 ~ppc ~ppc64 ~x86"
-IUSE="audit +gtk +introspection qt5 +gnome"
+IUSE="audit +gtk +introspection qt5 +gnome +vala"
 
 COMMON_DEPEND="
 	>=dev-libs/glib-2.32.3:2
@@ -37,7 +37,8 @@
 	dev-util/intltool
 	sys-devel/gettext
 	virtual/pkgconfig
-	gnome? ( gnome-base/gnome-common )"
+	gnome? ( gnome-base/gnome-common )
+	vala? ( $(vala_depend) )"
 PDEPEND="gtk? ( x11-misc/lightdm-gtk-greeter )"
 
 DOCS=( NEWS )
@@ -67,6 +68,8 @@
 	else
 		AT_M4DIR=${WORKDIR} eautoreconf
 	fi
+
+	use vala && vala_src_prepare
 }
 
 src_configure() {
@@ -93,6 +96,7 @@
 		$(use_enable introspection) \
 		--disable-liblightdm-qt \
 		$(use_enable qt5 liblightdm-qt5) \
+		$(use_enable vala) \
 		--with-user-session=${_session} \
 		--with-greeter-session=${_greeter} \
 		--with-greeter-user=${_user}