diff --git a/gnu/packages/python-xyz.scm b/gnu/packages/python-xyz.scm
index b3a350aca4..57f66e18f1 100644
--- a/gnu/packages/python-xyz.scm
+++ b/gnu/packages/python-xyz.scm
@@ -8479,6 +8479,7 @@ (define-public python-jupyter-core
     (native-search-paths
      (list (search-path-specification
             (variable "JUPYTER_CONFIG_DIR")
+            (separator #f)                        ;single entry
             (files '("etc/jupyter")))
            (search-path-specification
             (variable "JUPYTER_PATH")