diff --git a/pkgs/development/ocaml-modules/caqti/async.nix b/pkgs/development/ocaml-modules/caqti/async.nix
index 0e0da6a94bb7..148694770777 100644
--- a/pkgs/development/ocaml-modules/caqti/async.nix
+++ b/pkgs/development/ocaml-modules/caqti/async.nix
@@ -2,7 +2,6 @@
 
 buildDunePackage {
   pname = "caqti-async";
-  useDune2 = true;
   inherit (caqti) version src;
 
   propagatedBuildInputs = [ async_kernel async_unix caqti core_kernel ];
diff --git a/pkgs/development/ocaml-modules/caqti/default.nix b/pkgs/development/ocaml-modules/caqti/default.nix
index 510437f1c3bc..5edb68d30cfa 100644
--- a/pkgs/development/ocaml-modules/caqti/default.nix
+++ b/pkgs/development/ocaml-modules/caqti/default.nix
@@ -1,19 +1,16 @@
-{ lib, fetchFromGitHub, buildDunePackage, ocaml
+{ lib, fetchurl, buildDunePackage, ocaml
 , cppo, logs, ptime, uri, bigstringaf
 , re, cmdliner, alcotest }:
 
 buildDunePackage rec {
   pname = "caqti";
-  version = "1.8.0";
-  useDune2 = true;
+  version = "1.9.1";
 
-  minimumOCamlVersion = "4.04";
+  minimalOCamlVersion = "4.04";
 
-  src = fetchFromGitHub {
-    owner = "paurkedal";
-    repo = "ocaml-${pname}";
-    rev = "v${version}";
-    sha256 = "sha256-8uKlrq9j1Z3QzkCyoRIn2j6wCdGyo7BY7XlbFHN1xVE=";
+  src = fetchurl {
+    url = "https://github.com/paurkedal/ocaml-caqti/releases/download/v${version}/caqti-v${version}.tbz";
+    sha256 = "sha256-PQBgJBNx3IcE6/vyNIf26a2xStU22LBhff8eM6UPaJ4=";
   };
 
   nativeBuildInputs = [ cppo ];
diff --git a/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix b/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix
index 5f4f681540e9..bff515eff381 100644
--- a/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix
+++ b/pkgs/development/ocaml-modules/caqti/driver-mariadb.nix
@@ -2,7 +2,6 @@
 
 buildDunePackage {
   pname = "caqti-driver-mariadb";
-  useDune2 = true;
   inherit (caqti) version src;
 
   propagatedBuildInputs = [ caqti mariadb ];
diff --git a/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix b/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix
index a1b427a5edf4..f33e38fab8df 100644
--- a/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix
+++ b/pkgs/development/ocaml-modules/caqti/driver-postgresql.nix
@@ -2,7 +2,6 @@
 
 buildDunePackage {
   pname = "caqti-driver-postgresql";
-  useDune2 = true;
   inherit (caqti) version src;
 
   propagatedBuildInputs = [ caqti postgresql ];
diff --git a/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix b/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix
index 5282ba5ef505..822c002a8de3 100644
--- a/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix
+++ b/pkgs/development/ocaml-modules/caqti/driver-sqlite3.nix
@@ -2,7 +2,6 @@
 
 buildDunePackage {
   pname = "caqti-driver-sqlite3";
-  useDune2 = true;
   inherit (caqti) version src;
 
   propagatedBuildInputs = [ caqti ocaml_sqlite3 ];
diff --git a/pkgs/development/ocaml-modules/caqti/dynload.nix b/pkgs/development/ocaml-modules/caqti/dynload.nix
index 6ed86683728b..8e6a30a1a312 100644
--- a/pkgs/development/ocaml-modules/caqti/dynload.nix
+++ b/pkgs/development/ocaml-modules/caqti/dynload.nix
@@ -2,7 +2,6 @@
 
 buildDunePackage {
   pname = "caqti-dynload";
-  useDune2 = true;
   inherit (caqti) version src;
 
   propagatedBuildInputs = [ caqti ];
diff --git a/pkgs/development/ocaml-modules/caqti/lwt.nix b/pkgs/development/ocaml-modules/caqti/lwt.nix
index f02fa377f806..d06421136280 100644
--- a/pkgs/development/ocaml-modules/caqti/lwt.nix
+++ b/pkgs/development/ocaml-modules/caqti/lwt.nix
@@ -2,7 +2,6 @@
 
 buildDunePackage {
   pname = "caqti-lwt";
-  useDune2 = true;
   inherit (caqti) version src;
 
   propagatedBuildInputs = [ caqti logs lwt ];
diff --git a/pkgs/development/ocaml-modules/caqti/type-calendar.nix b/pkgs/development/ocaml-modules/caqti/type-calendar.nix
index d2050e2cf474..26b0887f20e8 100644
--- a/pkgs/development/ocaml-modules/caqti/type-calendar.nix
+++ b/pkgs/development/ocaml-modules/caqti/type-calendar.nix
@@ -2,9 +2,7 @@
 
 buildDunePackage {
   pname = "caqti-type-calendar";
-  version = "1.2.0";
-  useDune2 = true;
-  inherit (caqti) src;
+  inherit (caqti) src version;
 
   propagatedBuildInputs = [ calendar caqti ];