diff --git a/pkgs/development/ocaml-modules/reason-native/cli.nix b/pkgs/development/ocaml-modules/reason-native/cli.nix
index ee5e7d2774d2..c6c5abfb7f9a 100644
--- a/pkgs/development/ocaml-modules/reason-native/cli.nix
+++ b/pkgs/development/ocaml-modules/reason-native/cli.nix
@@ -1,7 +1,10 @@
-{ re, reason, pastel, ... }:
+{ lib, buildDunePackage, re, reason, pastel, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "cli";
+  version = "0.0.1-alpha-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -11,4 +14,11 @@
     re
     pastel
   ];
+
+ meta = {
+    downloadPage = "https://github.com/reasonml/reason-native";
+    homepage = "https://reason-native.com/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+  };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/console.nix b/pkgs/development/ocaml-modules/reason-native/console.nix
index a39ba9a7e3ec..38d95a0c0f39 100644
--- a/pkgs/development/ocaml-modules/reason-native/console.nix
+++ b/pkgs/development/ocaml-modules/reason-native/console.nix
@@ -1,21 +1,24 @@
-{ buildDunePackage, callPackage, reason, console, ... }:
+{ lib, buildDunePackage, callPackage, reason, console, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "console";
+  version = "0.1.0-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
   ];
 
   passthru.tests = {
-    console = callPackage ./tests/console {
-      inherit buildDunePackage reason console;
-    };
+    console = callPackage ./tests/console { };
   };
 
   meta = {
     description = "Library providing a web-influenced polymorphic console API for native Console.log(anything) with runtime printing";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/console";
     homepage = "https://reason-native.com/docs/console/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/default.nix b/pkgs/development/ocaml-modules/reason-native/default.nix
index 024783cf6184..b44e63080e5c 100644
--- a/pkgs/development/ocaml-modules/reason-native/default.nix
+++ b/pkgs/development/ocaml-modules/reason-native/default.nix
@@ -1,43 +1,47 @@
-{ newScope, lib, fetchFromGitHub, callPackage, buildDunePackage, atdgen, junit, qcheck-core, re, reason, reason-native, fetchpatch }:
+{
+  lib,
+  newScope,
+  fetchFromGitHub,
+  atdgen,
+  buildDunePackage,
+  junit,
+  ppxlib,
+  qcheck-core,
+  re,
+  reason,
+}:
 
-let
-  generic = (somePath:
-    let
-      prepkg = import somePath {
-        inherit callPackage cli buildDunePackage atdgen junit qcheck-core re reason fetchpatch;
-        inherit (reason-native) console file-context-printer fp pastel rely;
-      };
-    in
-      buildDunePackage
-        ({
-          version = "2022-08-31-a0ddab6";
-          src = fetchFromGitHub {
-            owner = "reasonml";
-            repo = "reason-native";
-            rev = "a0ddab6ab25237961e32d8732b0a222ec2372d4a";
-            hash = "sha256-s2N5OFTwIbKXcv05gQRaBMCHO1Mj563yhryPeo8jMh8=";
-          };
-          duneVersion = "3";
-          meta = with lib; {
-            description = "Libraries for building and testing native Reason programs";
-            downloadPage = "https://github.com/reasonml/reason-native";
-            homepage = "https://reason-native.com/";
-            license = licenses.mit;
-            maintainers = with maintainers; [ ];
-          } // (prepkg.meta or {});
-        } // prepkg)
-  );
-  cli = generic ./cli.nix; # Used only by Rely.
-in
-  lib.makeScope newScope (self: with self; {
-    console = generic ./console.nix;
-    dir = generic ./dir.nix;
-    file-context-printer = generic ./file-context-printer.nix;
-    fp = generic ./fp.nix;
-    pastel = generic ./pastel.nix;
-    pastel-console = generic ./pastel-console.nix;
-    qcheck-rely = generic ./qcheck-rely.nix;
-    refmterr = generic ./refmterr.nix;
-    rely = generic ./rely.nix;
-    rely-junit-reporter = generic ./rely-junit-reporter.nix;
-  })
+lib.makeScope newScope (self: {
+  inherit lib buildDunePackage re reason ppxlib;
+
+  # Upstream doesn't use tags, releases, or branches.
+  src = fetchFromGitHub {
+    owner = "reasonml";
+    repo = "reason-native";
+    rev = "20b1997b6451d9715dfdbeec86a9d274c7430ed8";
+    hash = "sha256-96Ucq70eSy6pqh5ne9xoODWe/nPuriZnFAdx0OkLVCs=";
+  };
+
+  cli = self.callPackage ./cli.nix { };
+  console = self.callPackage ./console.nix { };
+  dir = self.callPackage ./dir.nix { };
+  file-context-printer = self.callPackage ./file-context-printer.nix { };
+  frame = self.callPackage ./frame.nix { };
+  fp = self.callPackage ./fp.nix { };
+  fs = self.callPackage ./fs.nix { };
+  pastel = self.callPackage ./pastel.nix { };
+  pastel-console = self.callPackage ./pastel-console.nix { };
+  qcheck-rely = self.callPackage ./qcheck-rely.nix {
+    inherit qcheck-core;
+  };
+  refmterr = self.callPackage ./refmterr.nix {
+    inherit atdgen;
+  };
+  rely = self.callPackage ./rely.nix { };
+  rely-junit-reporter = self.callPackage ./rely-junit-reporter.nix {
+    inherit atdgen junit;
+  };
+  unicode-config = self.callPackage ./unicode-config.nix { };
+  unicode = self.callPackage ./unicode.nix { };
+  utf8 = self.callPackage ./utf8.nix { };
+})
diff --git a/pkgs/development/ocaml-modules/reason-native/dir.nix b/pkgs/development/ocaml-modules/reason-native/dir.nix
index 8b09eafc3696..6cd04ece01f6 100644
--- a/pkgs/development/ocaml-modules/reason-native/dir.nix
+++ b/pkgs/development/ocaml-modules/reason-native/dir.nix
@@ -1,7 +1,10 @@
-{ reason, fp, ... }:
+{ lib, buildDunePackage, reason, fp, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "dir";
+  version = "0.0.1-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -14,5 +17,7 @@
   meta = {
     description = "Library that provides a consistent API for common system, user and application directories consistently on all platforms";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/dir";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/file-context-printer.nix b/pkgs/development/ocaml-modules/reason-native/file-context-printer.nix
index a7c663493ef5..462b667921c1 100644
--- a/pkgs/development/ocaml-modules/reason-native/file-context-printer.nix
+++ b/pkgs/development/ocaml-modules/reason-native/file-context-printer.nix
@@ -1,7 +1,10 @@
-{ reason, re, pastel, ... }:
+{ lib, buildDunePackage, reason, re, pastel, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "file-context-printer";
+  version = "0.0.3-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -16,5 +19,7 @@
     description = "Utility for displaying snippets of files on the command line";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/file-context-printer";
     homepage = "https://reason-native.com/docs/file-context-printer/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/fp.nix b/pkgs/development/ocaml-modules/reason-native/fp.nix
index 7df1c84e55cf..35a099771dc6 100644
--- a/pkgs/development/ocaml-modules/reason-native/fp.nix
+++ b/pkgs/development/ocaml-modules/reason-native/fp.nix
@@ -1,7 +1,10 @@
-{ reason, ... }:
+{ lib, buildDunePackage, reason, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "fp";
+  version = "0.0.1-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -10,5 +13,7 @@
   meta = {
     description = "Library for creating and operating on file paths consistently on multiple platforms";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/fp";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/frame.nix b/pkgs/development/ocaml-modules/reason-native/frame.nix
new file mode 100644
index 000000000000..dc845db55249
--- /dev/null
+++ b/pkgs/development/ocaml-modules/reason-native/frame.nix
@@ -0,0 +1,24 @@
+{ lib, buildDunePackage, reason, re, pastel, src }:
+
+buildDunePackage {
+  inherit src;
+
+  pname = "frame";
+  version = "0.0.1-unstable-2024-05-07";
+
+  nativeBuildInputs = [
+    reason
+  ];
+
+  propagatedBuildInputs = [
+    pastel
+    re
+  ];
+
+  meta = {
+    description = "Reason Native text layout library";
+    downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/frame";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+  };
+}
diff --git a/pkgs/development/ocaml-modules/reason-native/fs.nix b/pkgs/development/ocaml-modules/reason-native/fs.nix
new file mode 100644
index 000000000000..c553f6a6ad98
--- /dev/null
+++ b/pkgs/development/ocaml-modules/reason-native/fs.nix
@@ -0,0 +1,24 @@
+{ lib, buildDunePackage, fp, reason, src }:
+
+buildDunePackage {
+  inherit src;
+
+  pname = "fs";
+  version = "0.0.2-unstable-2024-05-07";
+
+  nativeBuildInputs = [
+    reason
+  ];
+
+  propagatedBuildInputs = [
+    fp
+  ];
+
+  meta = {
+    description = "Reason Native file system API";
+    downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/fs";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+  };
+}
+
diff --git a/pkgs/development/ocaml-modules/reason-native/pastel-console.nix b/pkgs/development/ocaml-modules/reason-native/pastel-console.nix
index 968b9f88af91..1a424fad5401 100644
--- a/pkgs/development/ocaml-modules/reason-native/pastel-console.nix
+++ b/pkgs/development/ocaml-modules/reason-native/pastel-console.nix
@@ -1,7 +1,10 @@
-{ reason, console, pastel, ... }:
+{ lib, buildDunePackage, reason, console, pastel, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "pastel-console";
+  version = "0.0.0-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -16,5 +19,7 @@
     description = "Small library for pretty coloring to Console output";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/pastel-console";
     homepage = "https://reason-native.com/docs/pastel/console";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/pastel.nix b/pkgs/development/ocaml-modules/reason-native/pastel.nix
index 6d08243638ca..d8a4d7e0f9ca 100644
--- a/pkgs/development/ocaml-modules/reason-native/pastel.nix
+++ b/pkgs/development/ocaml-modules/reason-native/pastel.nix
@@ -1,13 +1,17 @@
-{ reason, re, ... }:
+{ lib, buildDunePackage, reason, re, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "pastel";
+  version = "0.3.0-unstable-2024-05-07";
 
   minimalOCamlVersion = "4.05";
 
   nativeBuildInputs = [
     reason
   ];
+
   propagatedBuildInputs = [
     re
   ];
@@ -16,5 +20,7 @@
     description = "Text formatting library that harnesses Reason JSX to provide intuitive terminal output. Like React but for CLI";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/pastel";
     homepage = "https://reason-native.com/docs/pastel/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/qcheck-rely.nix b/pkgs/development/ocaml-modules/reason-native/qcheck-rely.nix
index ac645791f46c..4006df5d90c8 100644
--- a/pkgs/development/ocaml-modules/reason-native/qcheck-rely.nix
+++ b/pkgs/development/ocaml-modules/reason-native/qcheck-rely.nix
@@ -1,23 +1,15 @@
-{ qcheck-core, reason, console, rely, fetchpatch, ... }:
+{ lib, buildDunePackage, qcheck-core, reason, console, rely, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "qcheck-rely";
+  version = "1.0.2-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
   ];
 
-  patches = [
-    (fetchpatch {
-      url = "https://github.com/reasonml/reason-native/pull/269/commits/b42d66f5929a11739c13f849939007bf8610888b.patch";
-      hash = "sha256-MMLl3eqF8xQZ2T+sIEuv2WpnGF6FZtatgH5fiF5hpP4=";
-      includes = [
-        "src/qcheck-rely/QCheckRely.re"
-        "src/qcheck-rely/QCheckRely.rei"
-      ];
-    })
-  ];
-
   propagatedBuildInputs = [
     qcheck-core
     console
@@ -27,5 +19,7 @@
   meta = {
     description = "Library containing custom Rely matchers allowing for easily using QCheck with Rely. QCheck is a 'QuickCheck inspired property-based testing for OCaml, and combinators to generate random values to run tests on'";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/qcheck-rely";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/refmterr.nix b/pkgs/development/ocaml-modules/reason-native/refmterr.nix
index 17c595d9e107..3f320fd2364d 100644
--- a/pkgs/development/ocaml-modules/reason-native/refmterr.nix
+++ b/pkgs/development/ocaml-modules/reason-native/refmterr.nix
@@ -1,7 +1,10 @@
-{ atdgen, re, reason, pastel, ... }:
+{ lib, buildDunePackage, atdgen, re, reason, pastel, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "refmterr";
+  version = "3.3.0-unstable-2024-05-07";
 
   nativeBuildInputs = [
     atdgen
@@ -18,5 +21,7 @@
     description = "Error formatter tool for Reason and OCaml. Takes raw error output from compiler and converts to pretty output";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/refmterr";
     homepage = "https://reason-native.com/docs/refmterr/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/rely-junit-reporter.nix b/pkgs/development/ocaml-modules/reason-native/rely-junit-reporter.nix
index 25d9cc2c5f70..46097c45ebdf 100644
--- a/pkgs/development/ocaml-modules/reason-native/rely-junit-reporter.nix
+++ b/pkgs/development/ocaml-modules/reason-native/rely-junit-reporter.nix
@@ -1,7 +1,10 @@
-{ atdgen, junit, re, reason, pastel, rely, ... }:
+{ lib, buildDunePackage, atdgen, junit, re, reason, pastel, rely, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "rely-junit-reporter";
+  version = "1.0.0-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -22,5 +25,7 @@
     description = "Tool providing JUnit Reporter for Rely Testing Framework";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/rely-junit-reporter";
     homepage = "https://reason-native.com/docs/rely/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/rely.nix b/pkgs/development/ocaml-modules/reason-native/rely.nix
index 40315a668ba9..e3ca4b9ad5e9 100644
--- a/pkgs/development/ocaml-modules/reason-native/rely.nix
+++ b/pkgs/development/ocaml-modules/reason-native/rely.nix
@@ -1,7 +1,10 @@
-{ re, reason, cli, file-context-printer, pastel, ... }:
+{ lib, buildDunePackage, re, reason, cli, file-context-printer, pastel, src }:
+
+buildDunePackage {
+  inherit src;
 
-{
   pname = "rely";
+  version = "4.0.0-unstable-2024-05-07";
 
   nativeBuildInputs = [
     reason
@@ -18,5 +21,7 @@
     description = "Jest-inspired testing framework for native OCaml/Reason";
     downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/rely";
     homepage = "https://reason-native.com/docs/rely/";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
   };
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/tests/console/console-test.opam b/pkgs/development/ocaml-modules/reason-native/tests/console/console_test.opam
similarity index 100%
rename from pkgs/development/ocaml-modules/reason-native/tests/console/console-test.opam
rename to pkgs/development/ocaml-modules/reason-native/tests/console/console_test.opam
diff --git a/pkgs/development/ocaml-modules/reason-native/tests/console/console-test.re b/pkgs/development/ocaml-modules/reason-native/tests/console/console_test.re
similarity index 100%
rename from pkgs/development/ocaml-modules/reason-native/tests/console/console-test.re
rename to pkgs/development/ocaml-modules/reason-native/tests/console/console_test.re
diff --git a/pkgs/development/ocaml-modules/reason-native/tests/console/default.nix b/pkgs/development/ocaml-modules/reason-native/tests/console/default.nix
index fc7f1891339b..b2bc31565f04 100644
--- a/pkgs/development/ocaml-modules/reason-native/tests/console/default.nix
+++ b/pkgs/development/ocaml-modules/reason-native/tests/console/default.nix
@@ -1,20 +1,34 @@
-{ lib, buildDunePackage, reason, console }:
+{ lib, buildDunePackage, reason, console, ppxlib }:
 
-buildDunePackage rec {
-  pname = "console-test";
+buildDunePackage {
+  pname = "console_test";
   version = "1";
 
-  src = ./.;
+  src = lib.fileset.toSource {
+    root = ./.;
+    fileset = lib.fileset.unions [
+      ./console_test.opam
+      ./console_test.re
+      ./dune
+      ./dune-project
+    ];
+  };
 
   duneVersion = "3";
 
+  nativeBuildInputs = [
+    reason
+  ];
+
   buildInputs = [
     reason
     console
+    ppxlib
   ];
 
   doInstallCheck = true;
+
   postInstallCheck = ''
-    $out/bin/console-test | grep -q "{\"Hello fellow Nixer!\"}" > /dev/null
+    $out/bin/console_test | grep -q "{\"Hello fellow Nixer!\"}" > /dev/null
   '';
 }
diff --git a/pkgs/development/ocaml-modules/reason-native/tests/console/dune b/pkgs/development/ocaml-modules/reason-native/tests/console/dune
index 49f2121385e2..3bf2eefb27db 100644
--- a/pkgs/development/ocaml-modules/reason-native/tests/console/dune
+++ b/pkgs/development/ocaml-modules/reason-native/tests/console/dune
@@ -1,4 +1,4 @@
 (executable
- (name console-test)
- (public_name console-test)
+ (name console_test)
+ (public_name console_test)
  (libraries reason console.lib))
diff --git a/pkgs/development/ocaml-modules/reason-native/tests/console/dune-project b/pkgs/development/ocaml-modules/reason-native/tests/console/dune-project
new file mode 100644
index 000000000000..a26d6e273960
--- /dev/null
+++ b/pkgs/development/ocaml-modules/reason-native/tests/console/dune-project
@@ -0,0 +1 @@
+(lang dune 1.6)
diff --git a/pkgs/development/ocaml-modules/reason-native/unicode-config.nix b/pkgs/development/ocaml-modules/reason-native/unicode-config.nix
new file mode 100644
index 000000000000..1b80ae2a71fd
--- /dev/null
+++ b/pkgs/development/ocaml-modules/reason-native/unicode-config.nix
@@ -0,0 +1,19 @@
+{ lib, buildDunePackage, reason, src }:
+
+buildDunePackage {
+  inherit src;
+
+  pname = "unicode-config";
+  version = "0.0.0-unstable-2024-05-07";
+
+  nativeBuildInputs = [
+    reason
+  ];
+
+  meta = {
+    description = "Configuration used to generate the @reason-native/unicode library";
+    downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/unicode-config";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+  };
+}
diff --git a/pkgs/development/ocaml-modules/reason-native/unicode.nix b/pkgs/development/ocaml-modules/reason-native/unicode.nix
new file mode 100644
index 000000000000..544367424d0b
--- /dev/null
+++ b/pkgs/development/ocaml-modules/reason-native/unicode.nix
@@ -0,0 +1,19 @@
+{ lib, buildDunePackage, reason, src }:
+
+buildDunePackage {
+  inherit src;
+
+  pname = "unicode";
+  version = "0.0.0-unstable-2024-05-07";
+
+  nativeBuildInputs = [
+    reason
+  ];
+
+  meta = {
+    description = "Easy to use and well documented Unicode symbols";
+    downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/unicode";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+  };
+}
diff --git a/pkgs/development/ocaml-modules/reason-native/utf8.nix b/pkgs/development/ocaml-modules/reason-native/utf8.nix
new file mode 100644
index 000000000000..40c874b5b41f
--- /dev/null
+++ b/pkgs/development/ocaml-modules/reason-native/utf8.nix
@@ -0,0 +1,20 @@
+{ lib, buildDunePackage, reason, src }:
+
+buildDunePackage {
+  inherit src;
+
+  pname = "utf8";
+  version = "0.1.0-unstable-2024-05-07";
+
+  nativeBuildInputs = [
+    reason
+  ];
+
+  meta = {
+    description = "Utf8 logic with minimal dependencies";
+    downloadPage = "https://github.com/reasonml/reason-native/tree/master/src/utf8";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ ];
+  };
+}
+