diff --git a/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix b/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix
new file mode 100644
index 000000000000..f96d5bf4ca60
--- /dev/null
+++ b/pkgs/development/ocaml-modules/janestreet/ppx-custom-printf.nix
@@ -0,0 +1,15 @@
+{stdenv, buildOcamlJane,
+ ppx_core, ppx_driver, ppx_sexp_conv, ppx_tools}:
+
+buildOcamlJane rec {
+  name = "ppx_custom_printf";
+  hash = "06y85m6ky376byja4w7gdwd339di5ag0xrf0czkylzjsnylhdr85";
+
+  propagatedBuildInputs = [ ppx_core ppx_driver ppx_sexp_conv ppx_tools ];
+
+  meta = with stdenv.lib; {
+    description = "Extensions to printf-style format-strings for user-defined string conversion.";
+    maintainers = [ maintainers.maurer ];
+    license = licenses.asl20;
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 6870665e2247..424efc9d0ea9 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -5533,6 +5533,8 @@ in
     ppx_bench = callPackage ../development/ocaml-modules/janestreet/ppx-bench.nix {};
 
     ppx_bin_prot = callPackage ../development/ocaml-modules/janestreet/ppx-bin-prot.nix {};
+
+    ppx_custom_printf = callPackage ../development/ocaml-modules/janestreet/ppx-custom-printf.nix {};
   };
 
   ocamlPackages = recurseIntoAttrs ocamlPackages_4_01_0;