diff --git a/pkgs/development/ocaml-modules/caqti/async.nix b/pkgs/development/ocaml-modules/caqti/async.nix
new file mode 100644
index 000000000000..0e0da6a94bb7
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/async.nix
@@ -0,0 +1,11 @@
+{ lib, buildDunePackage, async_kernel, async_unix, caqti, core_kernel }:
+
+buildDunePackage {
+  pname = "caqti-async";
+  useDune2 = true;
+  inherit (caqti) version src;
+
+  propagatedBuildInputs = [ async_kernel async_unix caqti core_kernel ];
+
+  meta = caqti.meta // { description = "Async support for Caqti"; };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/default.nix b/pkgs/development/ocaml-modules/caqti/default.nix
new file mode 100644
index 000000000000..6df0af597c21
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/default.nix
@@ -0,0 +1,26 @@
+{ lib, fetchFromGitHub, buildDunePackage, cppo, logs, ptime, uri }:
+
+buildDunePackage rec {
+  pname = "caqti";
+  version = "1.3.0";
+  useDune2 = true;
+
+  minimumOCamlVersion = "4.04";
+
+  src = fetchFromGitHub {
+    owner = "paurkedal";
+    repo = "ocaml-${pname}";
+    rev = "v${version}";
+    sha256 = "1ksjchfjnh059wvd95my1sv9b0ild0dfaiynbf2xsaz7zg1y4xmw";
+  };
+
+  buildInputs = [ cppo ];
+  propagatedBuildInputs = [ logs ptime uri ];
+
+  meta = {
+    description = "Unified interface to relational database libraries";
+    license = "LGPL-3.0-or-later WITH OCaml-LGPL-linking-exception";
+    maintainers = with lib.maintainers; [ bcc32 ];
+    homepage = "https://github.com/paurkedal/ocaml-caqti";
+  };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix b/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix
new file mode 100644
index 000000000000..5f4f681540e9
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix
@@ -0,0 +1,13 @@
+{ lib, buildDunePackage, caqti, mariadb }:
+
+buildDunePackage {
+  pname = "caqti-driver-mariadb";
+  useDune2 = true;
+  inherit (caqti) version src;
+
+  propagatedBuildInputs = [ caqti mariadb ];
+
+  meta = caqti.meta // {
+    description = "MariaDB driver for Caqti using C bindings";
+  };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix b/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix
new file mode 100644
index 000000000000..a1b427a5edf4
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix
@@ -0,0 +1,13 @@
+{ lib, buildDunePackage, caqti, postgresql }:
+
+buildDunePackage {
+  pname = "caqti-driver-postgresql";
+  useDune2 = true;
+  inherit (caqti) version src;
+
+  propagatedBuildInputs = [ caqti postgresql ];
+
+  meta = caqti.meta // {
+    description = "PostgreSQL driver for Caqti based on C bindings";
+  };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix b/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix
new file mode 100644
index 000000000000..5282ba5ef505
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix
@@ -0,0 +1,13 @@
+{ lib, buildDunePackage, caqti, ocaml_sqlite3 }:
+
+buildDunePackage {
+  pname = "caqti-driver-sqlite3";
+  useDune2 = true;
+  inherit (caqti) version src;
+
+  propagatedBuildInputs = [ caqti ocaml_sqlite3 ];
+
+  meta = caqti.meta // {
+    description = "Sqlite3 driver for Caqti using C bindings";
+  };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/dynload.nix b/pkgs/development/ocaml-modules/caqti/dynload.nix
new file mode 100644
index 000000000000..6ed86683728b
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/dynload.nix
@@ -0,0 +1,13 @@
+{ lib, buildDunePackage, caqti }:
+
+buildDunePackage {
+  pname = "caqti-dynload";
+  useDune2 = true;
+  inherit (caqti) version src;
+
+  propagatedBuildInputs = [ caqti ];
+
+  meta = caqti.meta // {
+    description = "Dynamic linking of Caqti drivers using findlib.dynload";
+  };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/lwt.nix b/pkgs/development/ocaml-modules/caqti/lwt.nix
new file mode 100644
index 000000000000..f02fa377f806
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/lwt.nix
@@ -0,0 +1,11 @@
+{ lib, buildDunePackage, caqti, logs, lwt }:
+
+buildDunePackage {
+  pname = "caqti-lwt";
+  useDune2 = true;
+  inherit (caqti) version src;
+
+  propagatedBuildInputs = [ caqti logs lwt ];
+
+  meta = caqti.meta // { description = "Lwt support for Caqti"; };
+}
diff --git a/pkgs/development/ocaml-modules/caqti/type-calendar.nix b/pkgs/development/ocaml-modules/caqti/type-calendar.nix
new file mode 100644
index 000000000000..d2050e2cf474
--- /dev/null
+++ b/pkgs/development/ocaml-modules/caqti/type-calendar.nix
@@ -0,0 +1,14 @@
+{ lib, buildDunePackage, calendar, caqti }:
+
+buildDunePackage {
+  pname = "caqti-type-calendar";
+  version = "1.2.0";
+  useDune2 = true;
+  inherit (caqti) src;
+
+  propagatedBuildInputs = [ calendar caqti ];
+
+  meta = caqti.meta // {
+    description = "Date and time field types using the calendar library";
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 1c987133167d..37e95baac9fc 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -130,6 +130,22 @@ let
 
     cairo2 = callPackage ../development/ocaml-modules/cairo2 { };
 
+    caqti = callPackage ../development/ocaml-modules/caqti { };
+
+    caqti-async = callPackage ../development/ocaml-modules/caqti/async.nix { };
+
+    caqti-driver-mariadb = callPackage ../development/ocaml-modules/caqti/driver-mariadb.nix { };
+
+    caqti-driver-postgresql = callPackage ../development/ocaml-modules/caqti/driver-postgresql.nix { };
+
+    caqti-driver-sqlite3 = callPackage ../development/ocaml-modules/caqti/driver-sqlite3.nix { };
+
+    caqti-dynload = callPackage ../development/ocaml-modules/caqti/dynload.nix { };
+
+    caqti-lwt = callPackage ../development/ocaml-modules/caqti/lwt.nix { };
+
+    caqti-type-calendar = callPackage ../development/ocaml-modules/caqti/type-calendar.nix { };
+
     cfstream = callPackage ../development/ocaml-modules/cfstream { };
 
     charInfo_width = callPackage ../development/ocaml-modules/charInfo_width { };