diff --git a/sci-visualization/kst/kst-2.0.8.ebuild b/sci-visualization/kst/kst-2.0.8-r1.ebuild
similarity index 95%
rename from sci-visualization/kst/kst-2.0.8.ebuild
rename to sci-visualization/kst/kst-2.0.8-r1.ebuild
index d5cfd61e3676a..148390c6c2656 100644
--- a/sci-visualization/kst/kst-2.0.8.ebuild
+++ b/sci-visualization/kst/kst-2.0.8-r1.ebuild
@@ -1,4 +1,4 @@
-# Copyright 1999-2018 Gentoo Foundation
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=6
@@ -30,7 +30,7 @@ RDEPEND="
 	dev-qt/qtxml:5
 	sci-libs/cfitsio
 	sci-libs/getdata
-	sci-libs/gsl
+	sci-libs/gsl:=
 	sci-libs/netcdf-cxx:3
 "
 DEPEND="${RDEPEND}