diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 25f534093c8e..b946c253ce79 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4355,6 +4355,8 @@ with pkgs;
     inherit (darwin.apple_sdk.frameworks) Security;
   };
 
+  inherit (ocamlPackages) patdiff;
+
   patool = with python3Packages; toPythonApplication patool;
 
   pbgopy = callPackage ../tools/text/pbgopy { };