diff --git a/dev-ada/gps/gps-2018-r1.ebuild b/dev-ada/gps/gps-2018-r1.ebuild
index 26542379d09d8..3ec2826b24fd0 100644
--- a/dev-ada/gps/gps-2018-r1.ebuild
+++ b/dev-ada/gps/gps-2018-r1.ebuild
@@ -19,16 +19,15 @@ SRC_URI="http://mirrors.cdn.adacore.com/art/5b0cf627c7a4475261f97ceb
 LICENSE="GPL-3"
 SLOT="0"
 KEYWORDS="amd64 x86"
-IUSE="gnat_2017 +gnat_2018"
+IUSE="+gnat_2018"
 
 RDEPEND="${PYTHON_DEPS}
-	dev-ada/gnatcoll-db[gnat_2017=,gnat_2018=,gnatcoll_db2ada,gnatinspect,xref]
-	dev-ada/gnatcoll-bindings[gnat_2017=,gnat_2018=,python]
-	~dev-ada/gtkada-2018[gnat_2017=,gnat_2017=]
-	dev-ada/libadalang[gnat_2017(-)?,gnat_2018(-)?]
+	dev-ada/gnatcoll-db[gnat_2018=,gnatcoll_db2ada,gnatinspect,xref]
+	dev-ada/gnatcoll-bindings[gnat_2018=,python]
+	~dev-ada/gtkada-2018[gnat_2018=]
+	~dev-ada/libadalang-2018[gnat_2018(-)?]
 	dev-libs/gobject-introspection
 	dev-libs/libffi
-	gnat_2017? ( sys-devel/llvm:5 )
 	gnat_2018? (
 		|| (
 			sys-devel/llvm:6
@@ -52,13 +51,8 @@ S="${WORKDIR}"/${MYP}
 PATCHES=( "${FILESDIR}"/${P}-gentoo.patch )
 
 pkg_setup() {
-	if use gnat_2017; then
-		GCC_PV=6.3.0
-		LLVM_MAX_SLOT=5
-	else
-		GCC_PV=7.3.1
-		LLVM_MAX_SLOT=7
-	fi
+	GCC_PV=7.3.1
+	LLVM_MAX_SLOT=7
 	GNATMAKE=gnatmake-${GCC_PV}
 	GNATDRV=gnat-${GCC_PV}
 	GNATLS=gnatls-${GCC_PV}
@@ -67,7 +61,6 @@ pkg_setup() {
 }
 
 src_prepare() {
-	GCC_PV=7.3.1
 	default
 	sed -i \
 		-e "s:@GNATMAKE@:${CHOST}-${GNATMAKE}:g" \