diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3a87fc08163e..d801145bc3d2 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -3009,6 +3009,7 @@ let
   ocamlPackages_3_11_2 = mkOcamlPackages ocaml_3_11_2 pkgs.ocamlPackages_3_11_2;
   ocamlPackages_3_12_1 = mkOcamlPackages ocaml_3_12_1 pkgs.ocamlPackages_3_12_1;
   ocamlPackages_4_00_1 = mkOcamlPackages ocaml_4_00_1 pkgs.ocamlPackages_4_00_1;
+  ocamlPackages_4_01_0 = mkOcamlPackages ocaml_4_01_0 pkgs.ocamlPackages_4_01_0;
 
   ocaml_make = callPackage ../development/ocaml-modules/ocamlmake { };