diff --git a/src/fib/dune b/src/fib/dune
index 4c6594f8..412c420b 100644
--- a/src/fib/dune
+++ b/src/fib/dune
@@ -3,10 +3,4 @@
  (public_name moonpool.fib)
  (synopsis "Fibers and structured concurrency for Moonpool")
  (libraries moonpool picos)
- (enabled_if
-  (>= %{ocaml_version} 5.0))
- (flags :standard -open Moonpool_private -open Moonpool)
- (optional)
- (preprocess
-  (action
-   (run %{project_root}/src/cpp/cpp.exe %{input-file}))))
+ (flags :standard -open Moonpool_private -open Moonpool))