diff --git a/lwt.opam b/lwt.opam
index 2f0979c47..2c11eac3f 100644
--- a/lwt.opam
+++ b/lwt.opam
@@ -31,7 +31,7 @@ depends: [
 depopts: ["base-threads" "base-unix" "conf-libev"]
 dev-repo: "git+https://github.com/ocsigen/lwt.git"
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   [
     "dune"
     "exec"
diff --git a/lwt.opam.template b/lwt.opam.template
index 8fc8771fc..dc64b241a 100644
--- a/lwt.opam.template
+++ b/lwt.opam.template
@@ -1,5 +1,5 @@
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   [
     "dune"
     "exec"
diff --git a/lwt_ppx.opam b/lwt_ppx.opam
index 958244c1f..b4a6b08fd 100644
--- a/lwt_ppx.opam
+++ b/lwt_ppx.opam
@@ -17,7 +17,7 @@ depends: [
   "lwt"
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   [
     "dune"
     "build"
diff --git a/lwt_ppx_let.opam b/lwt_ppx_let.opam
index 8fbb382a3..7ce9fe37e 100644
--- a/lwt_ppx_let.opam
+++ b/lwt_ppx_let.opam
@@ -17,7 +17,7 @@ depends: [
   "lwt"
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   [
     "dune"
     "build"
diff --git a/lwt_react.opam b/lwt_react.opam
index 7f5d7e195..236db54bb 100644
--- a/lwt_react.opam
+++ b/lwt_react.opam
@@ -17,7 +17,7 @@ depends: [
   "react" {>= "1.0.0"}
 ]
 build: [
-  ["dune" "subst"] {pinned}
+  ["dune" "subst"] {dev}
   [
     "dune"
     "build"