CI

.github/workflows/main.yml

@@ -61,9 +61,9 @@ jobs:
       - run: opam exec -- dune build @install -p opentelemetry
 
       - run: opam install lwt.6.1.1 -y
-        if: ${{ startsWith(matrix.ocaml-compiler, '5') }}
+        if: ${{ matrix.ocaml-compiler == '5.3.x' }}
       - run: opam exec -- dune build @install -p opentelemetry,opentelemetry-client,opentelemetry-lwt,opentelemetry-client-cohttp-lwt
-        if: ${{ startsWith(matrix.ocaml-compiler, '5') }}
+        if: ${{ matrix.ocaml-compiler == '5.3.x' }}
 
       - run: opam install ocaml-protoc
       - run: opam exec -- dune build @lint

src/client/lwt/dune

@@ -28,12 +28,16 @@
 
 (rule
  (enabled_if
-  (>= %{version:lwt} 6.0))
+  (and
+   %{lib-available:lwt}
+   (>= %{version:lwt} 6.0)))
  (action
   (copy types_.ml.6 types_.ml)))
 
 (rule
  (enabled_if
-  (< %{version:lwt} 6.0))
+  (and
+   %{lib-available:lwt}
+   (< %{version:lwt} 6.0)))
  (action
   (copy types_.ml.5 types_.ml)))