diff --git a/pkgs/development/ocaml-modules/angstrom/default.nix b/pkgs/development/ocaml-modules/angstrom/default.nix
index 45db2bb99816..502bd2ad44d7 100644
--- a/pkgs/development/ocaml-modules/angstrom/default.nix
+++ b/pkgs/development/ocaml-modules/angstrom/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, buildDunePackage, ocaml, ocaml-syntax-shims, alcotest, result, bigstringaf, ppx_let }:
+{ lib, fetchFromGitHub, buildDunePackage, ocaml, ocaml-syntax-shims, alcotest, result, bigstringaf, ppx_let, gitUpdater }:
 
 buildDunePackage rec {
   pname = "angstrom";
@@ -19,6 +19,8 @@ buildDunePackage rec {
   propagatedBuildInputs = [ bigstringaf result ];
   doCheck = lib.versionAtLeast ocaml.version "4.08";
 
+  passthru.updateScript = gitUpdater { };
+
   meta = {
     homepage = "https://github.com/inhabitedtype/angstrom";
     description = "OCaml parser combinators built for speed and memory efficiency";
diff --git a/pkgs/development/ocaml-modules/earlybird/default.nix b/pkgs/development/ocaml-modules/earlybird/default.nix
index a6a3648bec65..2ef4946306c9 100644
--- a/pkgs/development/ocaml-modules/earlybird/default.nix
+++ b/pkgs/development/ocaml-modules/earlybird/default.nix
@@ -1,5 +1,6 @@
-{ lib, fetchurl, ocaml, buildDunePackage
+{ lib, fetchFromGitHub, ocaml, buildDunePackage
 , cmdliner, dap, fmt, iter, logs, lru, lwt_ppx, lwt_react, menhir, menhirLib, path_glob, ppx_deriving_yojson
+, gitUpdater
 }:
 
 if lib.versionAtLeast ocaml.version "4.13"
@@ -14,13 +15,17 @@ buildDunePackage rec {
 
   minimumOCamlVersion = "4.11";
 
-  src = fetchurl {
-    url = "https://github.com/hackwaly/ocamlearlybird/releases/download/${version}/${pname}-${version}.tbz";
-    sha256 = "1pwzhcr3pw24ra4j4d23vz71h0psz4xkyp7b12l2wl1slxzjbrxa";
+  src = fetchFromGitHub {
+    owner = "hackwaly";
+    repo = "ocamlearlybird";
+    rev = version;
+    hash = "sha256-8JHZWsgpz2pzpDxST3bkMSmPHtj7MDzD5G3ujqMW+MU=";
   };
 
   buildInputs = [ cmdliner dap fmt iter logs lru lwt_ppx lwt_react menhir menhirLib path_glob ppx_deriving_yojson ];
 
+  passthru.updateScript = gitUpdater { };
+
   meta = {
     homepage = "https://github.com/hackwaly/ocamlearlybird";
     description = "OCaml debug adapter";
diff --git a/pkgs/development/ocaml-modules/mdx/default.nix b/pkgs/development/ocaml-modules/mdx/default.nix
index 50cddce99aff..dc8e2312e751 100644
--- a/pkgs/development/ocaml-modules/mdx/default.nix
+++ b/pkgs/development/ocaml-modules/mdx/default.nix
@@ -1,7 +1,9 @@
-{ lib, fetchurl, buildDunePackage, ocaml
+{ lib, fetchFromGitHub, buildDunePackage, ocaml
 , alcotest
 , astring, cmdliner, cppo, fmt, logs, ocaml-version, odoc-parser, ocaml_lwt, re, result, csexp
-, pandoc}:
+, pandoc
+, gitUpdater
+}:
 
 buildDunePackage rec {
   pname = "mdx";
@@ -9,9 +11,11 @@ buildDunePackage rec {
 
   minimalOCamlVersion = "4.08";
 
-  src = fetchurl {
-    url = "https://github.com/realworldocaml/mdx/releases/download/${version}/mdx-${version}.tbz";
-    sha256 = "sha256-ol1zy8LODDYdcnv/jByE0pnqJ5ujQuMALq3v9y7td/o=";
+  src = fetchFromGitHub {
+    owner = "realworldocaml";
+    repo = pname;
+    rev = version;
+    hash = "sha256-p7jmksltgfLFTSkPxMuJWJexLq2VvPWT/DJtDveOL/A=";
   };
 
   nativeBuildInputs = [ cppo ];
@@ -30,6 +34,8 @@ buildDunePackage rec {
     runHook postInstall
   '';
 
+  passthru.updateScript = gitUpdater { };
+
   meta = {
     description = "Executable OCaml code blocks inside markdown files";
     homepage = "https://github.com/realworldocaml/mdx";
diff --git a/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix b/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix
index 195b53a5fe12..ec160b2fc9fb 100644
--- a/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix
+++ b/pkgs/development/ocaml-modules/ppx_deriving_cmdliner/default.nix
@@ -5,6 +5,7 @@
 , cmdliner
 , ppx_deriving
 , ppxlib
+, gitUpdater
 }:
 
 buildDunePackage rec {
@@ -31,6 +32,8 @@ buildDunePackage rec {
     alcotest
   ];
 
+  passthru.updateScript = gitUpdater { rev-prefix = "v"; };
+
   meta = with lib; {
     description = "Ppx_deriving plugin for generating command line interfaces from types for OCaml";
     homepage = "https://github.com/hammerlab/ppx_deriving_cmdliner";
diff --git a/pkgs/development/ocaml-modules/printbox/default.nix b/pkgs/development/ocaml-modules/printbox/default.nix
index 28a53210f69f..8dd4bbedd4ba 100644
--- a/pkgs/development/ocaml-modules/printbox/default.nix
+++ b/pkgs/development/ocaml-modules/printbox/default.nix
@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, buildDunePackage, ocaml, mdx }:
+{ lib, fetchFromGitHub, buildDunePackage, ocaml, mdx, gitUpdater }:
 
 buildDunePackage rec {
   pname = "printbox";
@@ -20,6 +20,8 @@ buildDunePackage rec {
   # mdx is not available for OCaml < 4.08
   doCheck = lib.versionAtLeast ocaml.version "4.08";
 
+  passthru.updateScript = gitUpdater { rev-prefix = "v"; };
+
   meta = {
     homepage = "https://github.com/c-cube/printbox/";
     description = "Allows to print nested boxes, lists, arrays, tables in several formats";
diff --git a/pkgs/development/ocaml-modules/xml-light/default.nix b/pkgs/development/ocaml-modules/xml-light/default.nix
index 8eb700a4d14a..010d7f8e1dbf 100644
--- a/pkgs/development/ocaml-modules/xml-light/default.nix
+++ b/pkgs/development/ocaml-modules/xml-light/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchFromGitHub, ocaml, findlib }:
+{ stdenv, lib, fetchFromGitHub, ocaml, findlib, gitUpdater }:
 
 stdenv.mkDerivation rec {
   pname = "ocaml${ocaml.version}-xml-light";
@@ -25,6 +25,8 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
+  passthru.updateScript = gitUpdater { };
+
   meta = {
     description = "Minimal Xml parser and printer for OCaml";
     longDescription = ''