diff --git a/pkgs/development/ocaml-modules/pgx/default.nix b/pkgs/development/ocaml-modules/pgx/default.nix
new file mode 100644
index 000000000000..97ae2ff1d30a
--- /dev/null
+++ b/pkgs/development/ocaml-modules/pgx/default.nix
@@ -0,0 +1,45 @@
+{
+  alcotest,
+  buildDunePackage,
+  camlp-streams,
+  fetchurl,
+  hex,
+  ipaddr,
+  lib,
+  ppx_compare,
+  ppx_custom_printf,
+  ppx_sexp_conv,
+  re,
+  uuidm,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "pgx";
+  version = "2.3";
+  minimalOCamlVersion = "4.08";
+  src = fetchurl {
+    url = "https://github.com/pgx-ocaml/pgx/archive/refs/tags/${finalAttrs.version}.tar.gz";
+    hash = "sha256-Rp9PXsWI4cBc1YHD7uqKATrRt5tgNJowbaAFg1aeVKM=";
+  };
+
+  propagatedBuildInputs = [
+    camlp-streams
+    hex
+    ipaddr
+    ppx_compare
+    ppx_custom_printf
+    ppx_sexp_conv
+    re
+    uuidm
+  ];
+
+  checkInputs = [ alcotest ];
+  doCheck = true;
+
+  meta = {
+    description = "Pure-OCaml PostgreSQL client library";
+    homepage = "https://github.com/pgx-ocaml/pgx";
+    license = lib.licenses.lgpl2Only;
+    maintainers = [ lib.maintainers.vog ];
+  };
+})
diff --git a/pkgs/development/ocaml-modules/pgx/eio.nix b/pkgs/development/ocaml-modules/pgx/eio.nix
new file mode 100644
index 000000000000..18a0f2126b65
--- /dev/null
+++ b/pkgs/development/ocaml-modules/pgx/eio.nix
@@ -0,0 +1,29 @@
+{
+  alcotest,
+  base64,
+  buildDunePackage,
+  eio,
+  eio_main,
+  pgx,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "pgx_eio";
+  inherit (pgx) version src;
+
+  propagatedBuildInputs = [
+    eio
+    pgx
+  ];
+
+  checkInputs = [
+    alcotest
+    base64
+    eio_main
+  ];
+  doCheck = true;
+
+  meta = pgx.meta // {
+    description = "Pgx using Eio for IO";
+  };
+})
diff --git a/pkgs/development/ocaml-modules/pgx/lwt.nix b/pkgs/development/ocaml-modules/pgx/lwt.nix
new file mode 100644
index 000000000000..55531389c535
--- /dev/null
+++ b/pkgs/development/ocaml-modules/pgx/lwt.nix
@@ -0,0 +1,23 @@
+{
+  buildDunePackage,
+  logs,
+  lwt,
+  pgx,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "pgx_lwt";
+  inherit (pgx) version src;
+
+  propagatedBuildInputs = [
+    logs
+    lwt
+    pgx
+  ];
+
+  doCheck = true;
+
+  meta = pgx.meta // {
+    description = "Pgx using Lwt for IO";
+  };
+})
diff --git a/pkgs/development/ocaml-modules/pgx/lwt_unix.nix b/pkgs/development/ocaml-modules/pgx/lwt_unix.nix
new file mode 100644
index 000000000000..b9fdb01d85c5
--- /dev/null
+++ b/pkgs/development/ocaml-modules/pgx/lwt_unix.nix
@@ -0,0 +1,24 @@
+{
+  alcotest-lwt,
+  base64,
+  buildDunePackage,
+  pgx,
+  pgx_lwt,
+}:
+
+buildDunePackage (finalAttrs: {
+  pname = "pgx_lwt_unix";
+  inherit (pgx) version src;
+
+  propagatedBuildInputs = [ pgx_lwt ];
+
+  checkInputs = [
+    alcotest-lwt
+    base64
+  ];
+  doCheck = true;
+
+  meta = pgx.meta // {
+    description = "Pgx using Lwt and Unix libraries for IO";
+  };
+})
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 7900ff21a05e..04d368e4c4c4 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1725,6 +1725,14 @@ let
 
         pgsolver = callPackage ../development/ocaml-modules/pgsolver { };
 
+        pgx = callPackage ../development/ocaml-modules/pgx { };
+
+        pgx_eio = callPackage ../development/ocaml-modules/pgx/eio.nix { };
+
+        pgx_lwt = callPackage ../development/ocaml-modules/pgx/lwt.nix { };
+
+        pgx_lwt_unix = callPackage ../development/ocaml-modules/pgx/lwt_unix.nix { };
+
         phylogenetics = callPackage ../development/ocaml-modules/phylogenetics { };
 
         piaf = callPackage ../development/ocaml-modules/piaf { };