diff --git a/sci-libs/OpDiLib/OpDiLib-1.2.1.ebuild b/sci-libs/OpDiLib/OpDiLib-1.2.1-r1.ebuild
similarity index 98%
rename from sci-libs/OpDiLib/OpDiLib-1.2.1.ebuild
rename to sci-libs/OpDiLib/OpDiLib-1.2.1-r1.ebuild
index 5fc1bc3503..f166613e58 100644
--- a/sci-libs/OpDiLib/OpDiLib-1.2.1.ebuild
+++ b/sci-libs/OpDiLib/OpDiLib-1.2.1-r1.ebuild
@@ -15,7 +15,7 @@ SRC_URI="https://github.com/SciCompKL/${PN}/archive/refs/tags/v${PV}.tar.gz -> $
 KEYWORDS="~amd64"
 LICENSE='GPL-3'
 IUSE="examples"
-SLOT="0"
+SLOT="0/${PV}"
 
 DEPEND="examples? ( sci-libs/CoDiPack )"
 RDEPEND="${DEPEND}"