ocamlPackages.landmarks-ppx: unbreak (#500312)

pkgs/development/ocaml-modules/landmarks-ppx/default.nix

@@ -1,6 +1,7 @@
 {
   lib,
   buildDunePackage,
+  fetchpatch,
   ocaml,
   landmarks,
   ppxlib,
@@ -11,6 +12,11 @@ buildDunePackage {
 
   inherit (landmarks) src version;
 
+  patches = lib.optional (lib.versionAtLeast ppxlib.version "0.36") (fetchpatch {
+    url = "https://github.com/LexiFi/landmarks/commit/367c229e3275a83f81343ba116374bb68abc9d83.patch";
+    hash = "sha256-Qxue+++sNV6EHJGX1mbIeY2E2D5NuFpmIIBkTyvGvo8=";
+  });
+
   buildInputs = [ ppxlib ];
   propagatedBuildInputs = [ landmarks ];
 
@@ -22,6 +28,5 @@ buildDunePackage {
       Automatically or semi-automatically instrument your code using
       landmarks library.
     '';
-    broken = lib.versionAtLeast ppxlib.version "0.36";
   };
 }