fix non-existing directory

nbconvert/exporters/sphinx_howto.py

@@ -15,6 +15,7 b' formatted for use with PDFLatex.'
 #-----------------------------------------------------------------------------
 
 from IPython.utils.traitlets import Unicode
+from IPython.config import Config
 
 # local import
 import latex
@@ -34,7 +35,25 b' class SphinxHowtoExporter(latex.LatexExporter):'
     template_file = Unicode(
             'sphinx_howto', config=True,
             help="Name of the template file to use")
-    
+
+    _default_config = Config({
+        'SphinxTransformer': {'enabled':True}
+        })
+
+    def __init__(self, transformers=None, filters=None, config=None, **kw):
+
+        c = self.default_config
+        if config:
+            c.merge(config)
+
+        super(SphinxHowtoExporter, self).__init__(
+                                    transformers=transformers,
+                                    filters=filters,
+                                    config=c,
+                                    **kw)
+
+
+
     def _register_transformers(self):
         
         #Register the transformers of the base class.