diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index 1ab8f102e496..c1c62e9a09aa 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -20495,6 +20495,12 @@
     githubId = 19699320;
     keys = [ { fingerprint = "FD5D F7A8 85BB 378A 0157  5356 B09C 4220 3566 9AF8"; } ];
   };
+  RossSmyth = {
+    name = "Ross Smyth";
+    matrix = "@rosssmyth:matrix.org";
+    github = "RossSmyth";
+    githubId = 18294397;
+  };
   rostan-t = {
     name = "Rostan Tabet";
     email = "rostan.tabet@gmail.com";
diff --git a/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix b/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix
index c77c1ea30f2a..f2e247b2e57f 100644
--- a/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix
+++ b/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/default.nix
@@ -5,8 +5,16 @@
   callPackage,
 }:
 let
-  version = "1.62.0";
-  rescript-editor-analysis = callPackage ./rescript-editor-analysis.nix { inherit version; };
+  extVersion = "1.62.0";
+  rescript-editor-analysis = callPackage ./rescript-editor-analysis.nix { };
+
+  # Ensure the versions match
+  version =
+    if rescript-editor-analysis.version == extVersion then
+      rescript-editor-analysis.version
+    else
+      throw "analysis and extension versions must match";
+
   arch =
     if stdenv.hostPlatform.isLinux then
       "linux"
@@ -16,13 +24,19 @@ let
       throw "Unsupported system: ${stdenv.system}";
   analysisDir = "server/analysis_binaries/${arch}";
 in
-vscode-utils.buildVscodeMarketplaceExtension rec {
+
+vscode-utils.buildVscodeMarketplaceExtension {
   mktplcRef = {
     name = "rescript-vscode";
     publisher = "chenglou92";
     inherit version;
     hash = "sha256-yUAhysTM9FXo9ZAzrto+tnjnofIUEQAGBg3tjIainrY=";
   };
+
+  # For rescript-language-server
+  passthru.rescript-editor-analysis = rescript-editor-analysis;
+
+  strictDeps = true;
   postPatch = ''
     rm -r ${analysisDir}
     ln -s ${rescript-editor-analysis}/bin ${analysisDir}
@@ -35,6 +49,7 @@ vscode-utils.buildVscodeMarketplaceExtension rec {
       lib.maintainers.dlip
       lib.maintainers.jayesh-bhoot
     ];
+    platforms = lib.platforms.linux ++ lib.platforms.darwin;
     license = lib.licenses.mit;
   };
 }
diff --git a/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/rescript-editor-analysis.nix b/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/rescript-editor-analysis.nix
index b4763dc417a1..718d14a52851 100644
--- a/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/rescript-editor-analysis.nix
+++ b/pkgs/applications/editors/vscode/extensions/chenglou92.rescript-vscode/rescript-editor-analysis.nix
@@ -1,16 +1,14 @@
 {
   lib,
-  stdenv,
   fetchFromGitHub,
-  ocaml,
   ocamlPackages,
-  dune_3,
-  version,
 }:
 
-stdenv.mkDerivation {
-  pname = "rescript-editor-analysis";
-  inherit version;
+ocamlPackages.buildDunePackage rec {
+  pname = "analysis";
+  version = "1.62.0";
+
+  minimalOCamlVersion = "4.10";
 
   src = fetchFromGitHub {
     owner = "rescript-lang";
@@ -19,20 +17,11 @@ stdenv.mkDerivation {
     hash = "sha256-v+qCVge57wvA97mtzbxAX9Fvi7ruo6ZyIC14O8uWl9Y=";
   };
 
+  strictDeps = true;
   nativeBuildInputs = [
-    ocaml
-    dune_3
     ocamlPackages.cppo
   ];
 
-  buildPhase = ''
-    dune build -p analysis
-  '';
-
-  installPhase = ''
-    install -D -m0555 _build/default/analysis/bin/main.exe $out/bin/rescript-editor-analysis.exe
-  '';
-
   meta = {
     description = "Analysis binary for the ReScript VSCode plugin";
     homepage = "https://github.com/rescript-lang/rescript-vscode";
@@ -41,5 +30,6 @@ stdenv.mkDerivation {
       lib.maintainers.jayesh-bhoot
     ];
     license = lib.licenses.mit;
+    mainProgram = "rescript-editor-analysis";
   };
 }
diff --git a/pkgs/by-name/re/rescript-language-server/package.nix b/pkgs/by-name/re/rescript-language-server/package.nix
new file mode 100644
index 000000000000..5e700b3c18da
--- /dev/null
+++ b/pkgs/by-name/re/rescript-language-server/package.nix
@@ -0,0 +1,71 @@
+{
+  lib,
+  stdenv,
+  buildNpmPackage,
+  fetchFromGitHub,
+  esbuild,
+  nix-update-script,
+  versionCheckHook,
+  rescript-editor-analysis,
+}:
+let
+  version = "1.62.0";
+
+  platformDir =
+    if stdenv.hostPlatform.isLinux then
+      "linux"
+    else if stdenv.hostPlatform.isDarwin then
+      "darwin"
+    else
+      throw "Unsupported system: ${stdenv.system}";
+in
+buildNpmPackage rec {
+  pname = "rescript-language-server";
+  inherit version;
+
+  src = fetchFromGitHub {
+    owner = "rescript-lang";
+    repo = "rescript-vscode";
+    tag = version;
+    hash = "sha256-Tox5Qq0Kpqikac90sQww2cGr9RHlXnVy7GMnRA18CoA=";
+  };
+
+  sourceRoot = "${src.name}/server";
+  npmDepsHash = "sha256-Qi41qDJ0WR0QWw7guhuz1imT51SqI7mORGjNbmZWnio=";
+
+  strictDeps = true;
+  nativeBuildInputs = [ esbuild ];
+
+  # Tries to do funny things (install all packages for the entire repo) if you don't override it. This is just a copy paste
+  # from the package.json.
+  buildPhase = ''
+    runHook preBuild
+
+    # https://github.com/rescript-lang/rescript-vscode/blob/1.62.0/.github/workflows/ci.yml#L182-L183
+    mkdir analysis_binaries/${platformDir}
+    cp ${lib.getExe rescript-editor-analysis} analysis_binaries/${platformDir}/
+
+    # https://github.com/rescript-lang/rescript-vscode/blob/1.62.0/package.json#L252
+    esbuild src/cli.ts --bundle --sourcemap --outfile=out/cli.js --format=cjs --platform=node --loader:.node=file --minify
+
+    runHook postBuild
+  '';
+
+  nativeInstallCheckInputs = [
+    versionCheckHook
+  ];
+  versionCheckProgramArg = [ "--version" ];
+  doInstallCheck = true;
+
+  passthru.updateScript = nix-update-script { };
+
+  meta = {
+    description = "ReScript Language Server";
+    homepage = "https://github.com/rescript-lang/rescript-vscode/tree/${version}/server";
+    changelog = "https://github.com/rescript-lang/rescript-vscode/releases/tag/${version}";
+    mainProgram = "rescript-language-server";
+    license = lib.licenses.mit;
+    platforms = lib.platforms.linux ++ lib.platforms.darwin;
+    maintainers = [ lib.maintainers.RossSmyth ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 749d3683ca6b..7b1c49f932c3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -8153,6 +8153,10 @@ with pkgs;
   inherit (callPackage ../development/tools/replay-io { })
     replay-io replay-node-cli;
 
+  rescript-language-server = callPackage ../by-name/re/rescript-language-server/package.nix {
+    rescript-editor-analysis = vscode-extensions.chenglou92.rescript-vscode.rescript-editor-analysis;
+  };
+
   rnginline = with python3Packages; toPythonApplication rnginline;
 
   rr = callPackage ../development/tools/analysis/rr { };