diff --git a/test/blackbox-tests/test-cases/pkg/oxcaml/run.t b/test/blackbox-tests/test-cases/pkg/oxcaml/run.t
new file mode 100644
index 00000000000..b155a04af36
--- /dev/null
+++ b/test/blackbox-tests/test-cases/pkg/oxcaml/run.t
@@ -0,0 +1,29 @@
+  $ dune init proj oxcaml-test .
+  Success: initialized project component named oxcaml-test
+  $ sed -i -e 's/depends ocaml/depends (ocaml-variants (= 5.2.0+ox))/' dune-project
+  $ cat > dune-workspace <<EOF
+  > (lang dune 3.21)
+  > 
+  > (pkg enabled)
+  > 
+  > (repository
+  >   (name oxcaml)
+  >   (url git+https://github.com/oxcaml/opam-repository))
+  > 
+  > (lock_dir (repositories overlay oxcaml upstream))
+  $ dune build
+  autoconf (GNU Autoconf) 2.72
+  Copyright (C) 2023 Free Software Foundation, Inc.
+  License GPLv3+/Autoconf: GNU GPL version 3 or later
+  <https://gnu.org/licenses/gpl.html>, <https://gnu.org/licenses/exceptions.html>
+  This is free software: you are free to change and redistribute it.
+  There is NO WARRANTY, to the extent permitted by law.
+  
+  Written by David J. MacKenzie and Akim Demaille.
+  /usr/bin/which
+  Error:
+  open(_build/.sandbox/872740fa0e754203dd645f09218586ef/_private/default/.pkg/ocaml-variants.5.2.0+ox-e8081e89b062d32c64c33444259d0956/source/ignore-opam.patch): No such file or directory
+  -> required by
+     _build/_private/default/.pkg/ocaml-variants.5.2.0+ox-e8081e89b062d32c64c33444259d0956/target/cookie
+  -> required by loading the OCaml compiler for context "default"
+  [1]