diff --git a/bigstringaf.opam b/bigstringaf.opam
index 36ef484..9d67823 100644
--- a/bigstringaf.opam
+++ b/bigstringaf.opam
@@ -20,6 +20,9 @@ depopts: [
   "mirage-xen-posix"
   "ocaml-freestanding"
 ]
+conflicts: [
+  "ocaml-freestanding" {< "0.4.1"}
+]
 synopsis: "Bigstring intrinsics and fast blits based on memcpy/memmove"
 description: """
 Bigstring intrinsics and fast blits based on memcpy/memmove
diff --git a/lib/freestanding/jbuild b/lib/freestanding/jbuild
index 38c9a31..05cf397 100644
--- a/lib/freestanding/jbuild
+++ b/lib/freestanding/jbuild
@@ -4,7 +4,7 @@
  ((name        bigstringaf_freestanding)
   (public_name bigstringaf.freestanding)
   (optional)
-  (libraries   (bigarray mirage-solo5))
+  (libraries   (bigarray ocaml-freestanding))
   (c_names     (bigstringaf_stubs))
   (c_flags     (:include cflags.sexp))))