diff --git a/pkgs/development/ocaml-modules/janestreet/0.15.nix b/pkgs/development/ocaml-modules/janestreet/0.15.nix
index 897b24e6940e..676bea0e47fe 100644
--- a/pkgs/development/ocaml-modules/janestreet/0.15.nix
+++ b/pkgs/development/ocaml-modules/janestreet/0.15.nix
@@ -283,7 +283,8 @@ with self;
 
   core_unix = janePackage {
     pname = "core_unix";
-    hash = "1xzxqzg23in5ivz0v3qshzpr4w92laayscqj9im7jylh2ar1xi0a";
+    version = "0.15.2";
+    hash = "sha256-9f2PiLo+4Bjnfvh3scvIiPHj0wPZozmMMiCTe7vC1EA=";
     meta.description = "Unix-specific portions of Core";
     buildInputs = [ jst-config ];
     propagatedBuildInputs = [ core_kernel expect_test_helpers_core ocaml_intrinsics ppx_jane timezone spawn ];