diff --git a/nbconvert/exporters/templateexporter.py b/nbconvert/exporters/templateexporter.py
index a4aeb5889..fe8d262c9 100644
--- a/nbconvert/exporters/templateexporter.py
+++ b/nbconvert/exporters/templateexporter.py
@@ -640,6 +640,10 @@ def get_prefix_root_dirs(self):
         root_dirs = []
         if DEV_MODE:
             root_dirs.append(os.path.abspath(os.path.join(ROOT, "..", "..", "share", "jupyter")))
+        # Add a path relative to jupyter root directory, for modules installed in external folders
+        root_dirs.append(
+            os.path.abspath(os.path.join(ROOT, "..", "..", "..", "..", "share", "jupyter"))
+        )
         root_dirs.extend(jupyter_path())
         return root_dirs