diff --git a/packages/semver/semver.0.2.1/opam b/packages/semver/semver.0.2.1/opam
index e99fa2656f1..da8561997a9 100644
--- a/packages/semver/semver.0.2.1/opam
+++ b/packages/semver/semver.0.2.1/opam
@@ -1,6 +1,6 @@
 opam-version: "2.0"
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   ["dune" "build" "-p" name "-j" jobs]
   ["dune" "runtest" "-p" name "-j" jobs] {with-test}
   ["dune" "build" "-p" name "@doc"] {with-doc}