diff --git a/pkgs/development/ocaml-modules/dune-action-plugin/default.nix b/pkgs/development/ocaml-modules/dune-action-plugin/default.nix
index 1892c0dbada..1f101a35a58 100644
--- a/pkgs/development/ocaml-modules/dune-action-plugin/default.nix
+++ b/pkgs/development/ocaml-modules/dune-action-plugin/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildDunePackage, dune_3, dune-glob, dune-private-libs }:
+{ lib, buildDunePackage, dune_3, dune-glob, dune-private-libs, dune-rpc }:
 
 buildDunePackage rec {
   pname = "dune-action-plugin";
@@ -8,7 +8,7 @@ buildDunePackage rec {
 
   dontAddPrefix = true;
 
-  propagatedBuildInputs = [ dune-glob dune-private-libs ];
+  propagatedBuildInputs = [ dune-glob dune-private-libs dune-rpc ];
 
   preBuild = ''
     rm -r vendor/csexp
diff --git a/pkgs/development/ocaml-modules/dune-rpc/default.nix b/pkgs/development/ocaml-modules/dune-rpc/default.nix
index c0b2d958169..569be123794 100644
--- a/pkgs/development/ocaml-modules/dune-rpc/default.nix
+++ b/pkgs/development/ocaml-modules/dune-rpc/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildDunePackage, dune_3, stdune, ordering, pp, xdg, dyn }:
+{ lib, buildDunePackage, dune_3, csexp, stdune, ordering, pp, xdg, dyn }:
 
 buildDunePackage rec {
   pname = "dune-rpc";
@@ -8,7 +8,7 @@ buildDunePackage rec {
 
   dontAddPrefix = true;
 
-  buildInputs = [ stdune ordering pp xdg dyn ];
+  propagatedBuildInputs = [ csexp stdune ordering pp xdg dyn ];
 
   preBuild = ''
     rm -r vendor/csexp
diff --git a/pkgs/development/tools/ocaml/dune/3.nix b/pkgs/development/tools/ocaml/dune/3.nix
index 01145e0237c..28cef688d0d 100644
--- a/pkgs/development/tools/ocaml/dune/3.nix
+++ b/pkgs/development/tools/ocaml/dune/3.nix
@@ -6,11 +6,11 @@ else
 
 stdenv.mkDerivation rec {
   pname = "dune";
-  version = "3.4.1";
+  version = "3.5.0";
 
   src = fetchurl {
     url = "https://github.com/ocaml/dune/releases/download/${version}/dune-${version}.tbz";
-    sha256 = "sha256-KZ+jPP/BCMwm/1nV/J0J9ssKs6woC/I6ARTP3AtAxsU=";
+    sha256 = "sha256-d71MZwQ1n64ZaWNs/DzXpRe6NgSBnvickZwHYrUJNhA=";
   };
 
   nativeBuildInputs = [ ocaml findlib ];