diff --git a/dev-ml/dune-site/dune-site-3.21.1.ebuild b/dev-ml/dune-site/dune-site-3.21.1-r1.ebuild
similarity index 97%
rename from dev-ml/dune-site/dune-site-3.21.1.ebuild
rename to dev-ml/dune-site/dune-site-3.21.1-r1.ebuild
index 9d632b2ca897e..b1658320d182d 100644
--- a/dev-ml/dune-site/dune-site-3.21.1.ebuild
+++ b/dev-ml/dune-site/dune-site-3.21.1-r1.ebuild
@@ -20,6 +20,7 @@ RESTRICT="test"
 RDEPEND="
 	>=dev-ml/dune-3.21
 	dev-ml/csexp:=[ocamlopt?]
+	dev-ml/pp:=[ocamlopt?]
 	!dev-ml/dune-private-libs
 	!dev-ml/stdune
 	!dev-ml/dyn