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-rw-r--r--pkgs/development/ocaml-modules/ulex/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/development/ocaml-modules/ulex/default.nix b/pkgs/development/ocaml-modules/ulex/default.nix
index 9a5848db3f7b..d08f2c4c0ae3 100644
--- a/pkgs/development/ocaml-modules/ulex/default.nix
+++ b/pkgs/development/ocaml-modules/ulex/default.nix
@@ -26,6 +26,7 @@ stdenv.mkDerivation rec {
   createFindlibDestdir = true;
 
   nativeBuildInputs = [ ocaml findlib ocamlbuild camlp4 ];
+  propagatedBuildInputs = [ camlp4 ];
 
   strictDeps = true;