diff --git a/pkgs/development/ocaml-modules/dune-action-plugin/default.nix b/pkgs/development/ocaml-modules/dune-action-plugin/default.nix
index c39239525d1..1892c0dbada 100644
--- a/pkgs/development/ocaml-modules/dune-action-plugin/default.nix
+++ b/pkgs/development/ocaml-modules/dune-action-plugin/default.nix
@@ -10,6 +10,10 @@ buildDunePackage rec {
 
   propagatedBuildInputs = [ dune-glob dune-private-libs ];
 
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
+
   meta = with lib; {
     inherit (dune_3.meta) homepage;
     description = "API for writing dynamic Dune actions";
diff --git a/pkgs/development/ocaml-modules/dune-glob/default.nix b/pkgs/development/ocaml-modules/dune-glob/default.nix
index 04b5e762379..59b78a7b775 100644
--- a/pkgs/development/ocaml-modules/dune-glob/default.nix
+++ b/pkgs/development/ocaml-modules/dune-glob/default.nix
@@ -10,6 +10,10 @@ buildDunePackage rec {
 
   propagatedBuildInputs = [ dune-private-libs ];
 
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
+
   meta = with lib; {
     inherit (dune_3.meta) homepage;
     description = "Glob string matching language supported by dune";
diff --git a/pkgs/development/ocaml-modules/dune-private-libs/default.nix b/pkgs/development/ocaml-modules/dune-private-libs/default.nix
index 9b45064d198..ecd8a0016e6 100644
--- a/pkgs/development/ocaml-modules/dune-private-libs/default.nix
+++ b/pkgs/development/ocaml-modules/dune-private-libs/default.nix
@@ -13,6 +13,10 @@ buildDunePackage rec {
 
   propagatedBuildInputs = [ stdune ];
 
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
+
   meta = with lib; {
     description = "Private libraries of Dune";
     maintainers = [ maintainers.marsam ];
diff --git a/pkgs/development/ocaml-modules/dune-rpc/default.nix b/pkgs/development/ocaml-modules/dune-rpc/default.nix
new file mode 100644
index 00000000000..c0b2d958169
--- /dev/null
+++ b/pkgs/development/ocaml-modules/dune-rpc/default.nix
@@ -0,0 +1,23 @@
+{ lib, buildDunePackage, dune_3, stdune, ordering, pp, xdg, dyn }:
+
+buildDunePackage rec {
+  pname = "dune-rpc";
+  inherit (dune_3) src version;
+
+  duneVersion = "3";
+
+  dontAddPrefix = true;
+
+  buildInputs = [ stdune ordering pp xdg dyn ];
+
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
+
+  meta = with lib; {
+    description = "Library to connect and control a running dune instance";
+    inherit (dune_3.meta) homepage;
+    maintainers = with lib.maintainers; [ ];
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/development/ocaml-modules/dune-site/default.nix b/pkgs/development/ocaml-modules/dune-site/default.nix
index 8f51e182970..9eb2dcba5a4 100644
--- a/pkgs/development/ocaml-modules/dune-site/default.nix
+++ b/pkgs/development/ocaml-modules/dune-site/default.nix
@@ -10,6 +10,10 @@ buildDunePackage rec {
 
   propagatedBuildInputs = [ dune-private-libs ];
 
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
+
   meta = with lib; {
     description = "A library for embedding location information inside executable and libraries";
     inherit (dune_3.meta) homepage;
diff --git a/pkgs/development/ocaml-modules/fiber/default.nix b/pkgs/development/ocaml-modules/fiber/default.nix
new file mode 100644
index 00000000000..fe805c82a35
--- /dev/null
+++ b/pkgs/development/ocaml-modules/fiber/default.nix
@@ -0,0 +1,23 @@
+{ lib, buildDunePackage, dune_3, stdune, dyn }:
+
+buildDunePackage rec {
+  pname = "fiber";
+  inherit (dune_3) src version;
+
+  duneVersion = "3";
+
+  dontAddPrefix = true;
+
+  buildInputs = [ stdune dyn ];
+
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
+
+  meta = with lib; {
+    description = "Structured concurrency library";
+    inherit (dune_3.meta) homepage;
+    maintainers = with lib.maintainers; [ ];
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/development/ocaml-modules/ocaml-lsp/default.nix b/pkgs/development/ocaml-modules/ocaml-lsp/default.nix
index 602f5eb77fe..c1831e660f4 100644
--- a/pkgs/development/ocaml-modules/ocaml-lsp/default.nix
+++ b/pkgs/development/ocaml-modules/ocaml-lsp/default.nix
@@ -1,14 +1,13 @@
-{ lib, buildDunePackage, jsonrpc, lsp, re, makeWrapper, dot-merlin-reader, spawn }:
+{ lib, buildDunePackage, lsp, xdg, re, fiber, makeWrapper, dot-merlin-reader, spawn }:
 
-buildDunePackage {
+buildDunePackage rec {
   pname = "ocaml-lsp-server";
-  inherit (jsonrpc) version src;
-  useDune2 = true;
-
-  inherit (lsp) preBuild;
+  inherit (lsp) version src preBuild;
+  duneVersion = if lib.versionAtLeast version "1.10.0" then "3" else "2";
 
   buildInputs = lsp.buildInputs ++ [ lsp re ]
-  ++ lib.optional (lib.versionAtLeast jsonrpc.version "1.9") spawn;
+  ++ lib.optional (lib.versionAtLeast version "1.9") spawn
+  ++ lib.optionals (lib.versionAtLeast version "1.10") [ fiber xdg ];
 
   nativeBuildInputs = [ makeWrapper ];
 
@@ -16,7 +15,7 @@ buildDunePackage {
     wrapProgram $out/bin/ocamllsp --prefix PATH : ${dot-merlin-reader}/bin
   '';
 
-  meta = jsonrpc.meta // {
+  meta = lsp.meta // {
     description = "OCaml Language Server Protocol implementation";
   };
 }
diff --git a/pkgs/development/ocaml-modules/ocaml-lsp/jsonrpc.nix b/pkgs/development/ocaml-modules/ocaml-lsp/jsonrpc.nix
index 4f192fe20ec..2e6802a5042 100644
--- a/pkgs/development/ocaml-modules/ocaml-lsp/jsonrpc.nix
+++ b/pkgs/development/ocaml-modules/ocaml-lsp/jsonrpc.nix
@@ -10,10 +10,14 @@
 }:
 
 let params =
-  if lib.versionAtLeast ocaml.version "4.13"
+  if lib.versionAtLeast ocaml.version "4.14"
   then {
-    version = "1.10.3";
-    sha256 = "sha256-o6wQc7Byi5T0vbARF3LAq69/9wMkOZRQ6rcVa/rBUfE=";
+    version = "1.11.3";
+    sha256 = "sha256-KlMFh05O04I0Xil2B+nL2hUxZw0jaDMUnI23oUwGyhs=";
+  } else if lib.versionAtLeast ocaml.version "4.13"
+  then {
+    version = "1.10.5";
+    sha256 = "sha256-TeJS6t1ruWhWPvWNatrnSUWI6T17XKiosHLYizBDDcw=";
   } else if lib.versionAtLeast ocaml.version "4.12"
   then {
     version = "1.9.0";
@@ -32,7 +36,7 @@ buildDunePackage rec {
     inherit (params) sha256;
   };
 
-  useDune2 = true;
+  duneVersion = if lib.versionAtLeast version "1.10.0" then "3" else "2";
   minimalOCamlVersion = "4.06";
 
   buildInputs =
diff --git a/pkgs/development/ocaml-modules/ocaml-lsp/lsp.nix b/pkgs/development/ocaml-modules/ocaml-lsp/lsp.nix
index cd01116b820..faa14951907 100644
--- a/pkgs/development/ocaml-modules/ocaml-lsp/lsp.nix
+++ b/pkgs/development/ocaml-modules/ocaml-lsp/lsp.nix
@@ -8,18 +8,23 @@
 , omd
 , octavius
 , dune-build-info
+, dune-rpc
 , uutf
+, dyn
 , re
-, pp
+, stdune
+, dune_3
 , csexp
+, pp
 , cmdliner
+, ordering
 , ocamlformat-rpc-lib
 }:
 
 buildDunePackage rec {
   pname = "lsp";
   inherit (jsonrpc) version src;
-  useDune2 = true;
+  duneVersion = if lib.versionAtLeast version "1.10.0" then "3" else "2";
   minimumOCamlVersion =
     if lib.versionAtLeast version "1.7.0" then
       "4.12"
@@ -30,15 +35,30 @@ buildDunePackage rec {
   # They are vendored by upstream only because it is then easier to install
   # ocaml-lsp without messing with your opam switch, but nix should prevent
   # this type of problems without resorting to vendoring.
-  preBuild = ''
+  preBuild = lib.optionalString (lib.versionOlder version "1.10.4") ''
     rm -r ocaml-lsp-server/vendor/{octavius,uutf,omd,cmdliner}
   '';
 
   buildInputs =
-    if lib.versionAtLeast version "1.7.0" then
+    if lib.versionAtLeast version "1.10.0" then
+      [
+        pp
+        re
+        ppx_yojson_conv_lib
+        octavius
+        dune-build-info
+        dune-rpc
+        omd
+        cmdliner
+        ocamlformat-rpc-lib
+        dyn
+        stdune
+      ]
+    else if lib.versionAtLeast version "1.7.0" then
       [ pp re ppx_yojson_conv_lib octavius dune-build-info omd cmdliner ocamlformat-rpc-lib ]
     else
-      [ cppo
+      [
+        cppo
         ppx_yojson_conv_lib
         ocaml-syntax-shims
         octavius
diff --git a/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix b/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix
index 9a1d26f21f0..e3582cbed1d 100644
--- a/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix
+++ b/pkgs/development/ocaml-modules/ocamlformat-rpc-lib/default.nix
@@ -1,12 +1,24 @@
-{ lib, fetchurl, buildDunePackage, csexp, sexplib0 }:
+{ lib, fetchurl, buildDunePackage, ocaml, csexp, sexplib0 }:
+
+# for compat with ocaml-lsp
+let source =
+  if lib.versionAtLeast ocaml.version "4.13"
+  then {
+    version = "0.21.0";
+    sha256 = "sha256-KhgX9rxYH/DM6fCqloe4l7AnJuKrdXSe6Y1XY3BXMy0=";
+  } else {
+    version = "0.20.0";
+    sha256 = "sha256-JtmNCgwjbCyUE4bWqdH5Nc2YSit+rekwS43DcviIfgk=";
+  };
+in
 
 buildDunePackage rec {
   pname = "ocamlformat-rpc-lib";
-  version = "0.19.0";
+  inherit (source) version;
 
   src = fetchurl {
     url = "https://github.com/ocaml-ppx/ocamlformat/releases/download/${version}/ocamlformat-${version}.tbz";
-    sha256 = "sha256-YvxGqujwpKM85/jXcm1xCb/2Fepvy1DRSC8h0g7lD0Y=";
+    inherit (source) sha256;
   };
 
   minimumOCamlVersion = "4.08";
diff --git a/pkgs/development/ocaml-modules/stdune/default.nix b/pkgs/development/ocaml-modules/stdune/default.nix
index fd1e4f987b4..5e0b798772d 100644
--- a/pkgs/development/ocaml-modules/stdune/default.nix
+++ b/pkgs/development/ocaml-modules/stdune/default.nix
@@ -1,4 +1,4 @@
-{ lib, buildDunePackage, dune_3, dyn, ordering }:
+{ lib, buildDunePackage, dune_3, dyn, ordering, csexp }:
 
 buildDunePackage {
   pname = "stdune";
@@ -7,7 +7,11 @@ buildDunePackage {
 
   dontAddPrefix = true;
 
-  propagatedBuildInputs = [ dyn ordering ];
+  propagatedBuildInputs = [ dyn ordering csexp ];
+
+  preBuild = ''
+    rm -r vendor/csexp
+  '';
 
   meta = dune_3.meta // {
     description = "Dune's unstable standard library";
diff --git a/pkgs/development/ocaml-modules/xdg/default.nix b/pkgs/development/ocaml-modules/xdg/default.nix
new file mode 100644
index 00000000000..8d3810fa7e9
--- /dev/null
+++ b/pkgs/development/ocaml-modules/xdg/default.nix
@@ -0,0 +1,17 @@
+{ lib, buildDunePackage, dune_3 }:
+
+buildDunePackage rec {
+  pname = "xdg";
+  inherit (dune_3) src version;
+
+  duneVersion = "3";
+
+  dontAddPrefix = true;
+
+  meta = with lib; {
+    description = "XDG Base Directory Specification";
+    inherit (dune_3.meta) homepage;
+    maintainers = with lib.maintainers; [ ];
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 3619a844c72..9d7bce728c5 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -336,6 +336,8 @@ let
       inherit (pkgs) opam git mercurial coreutils gnutar bzip2;
     };
 
+    dune-rpc = callPackage ../development/ocaml-modules/dune-rpc { };
+
     dune-site = callPackage ../development/ocaml-modules/dune-site { };
 
     duration =  callPackage ../development/ocaml-modules/duration { };
@@ -423,6 +425,8 @@ let
       inherit (pkgs) ffmpeg;
     };
 
+    fiber = callPackage ../development/ocaml-modules/fiber { };
+
     fileutils = callPackage ../development/ocaml-modules/fileutils { };
 
     findlib = callPackage ../development/tools/ocaml/findlib { };
@@ -1418,6 +1422,8 @@ let
 
     x509 = callPackage ../development/ocaml-modules/x509 { };
 
+    xdg = callPackage ../development/ocaml-modules/xdg { };
+
     xenstore = callPackage ../development/ocaml-modules/xenstore { };
 
     xenstore_transport = callPackage ../development/ocaml-modules/xenstore_transport { };