diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index e9567a958595..5ad601af15da 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -399,10 +399,7 @@ let
 
     sequence = callPackage ../development/ocaml-modules/sequence { };
 
-    spacetime_lib = if lib.versionOlder "4.04" ocaml.version then
-    callPackage ../development/tools/ocaml/ocamlbuild { }
-    else
-    null;
+    spacetime_lib = callPackage ../development/ocaml-modules/spacetime_lib { };
 
     sqlexpr = callPackage ../development/ocaml-modules/sqlexpr { };