diff --git a/pkgs/development/ocaml-modules/seq/default.nix b/pkgs/development/ocaml-modules/seq/default.nix
index aa0546dd390b..44503668ff0a 100644
--- a/pkgs/development/ocaml-modules/seq/default.nix
+++ b/pkgs/development/ocaml-modules/seq/default.nix
@@ -20,7 +20,8 @@ stdenv.mkDerivation ({
     sha256 = "1cjpsc7q76yfgq9iyvswxgic4kfq2vcqdlmxjdjgd4lx87zvcwrv";
   };
 
-  buildInputs = [ ocaml findlib ocamlbuild ];
+  nativeBuildInputs = [ ocaml findlib ocamlbuild ];
+  strictDeps = true;
 
   createFindlibDestdir = true;