pythonPackages.nbconvert: include templates in search paths

pkgs/development/python-modules/nbconvert/default.nix

@@ -30,6 +30,16 @@ buildPythonPackage rec {
     sha256 = "cbbc13a86dfbd4d1b5dee106539de0795b4db156c894c2c5dc382062bbc29002";
   };
 
+  # Add $out/share/jupyter to the list of paths that are used to search for
+  # various exporter templates
+  patches = [
+    ./templates.patch
+  ];
+
+  postPatch = ''
+    substituteAllInPlace ./nbconvert/exporters/templateexporter.py
+  '';
+
   checkInputs = [ pytestCheckHook glibcLocales ];
 
   propagatedBuildInputs = [

pkgs/development/python-modules/nbconvert/templates.patch

@@ -0,0 +1,12 @@
+diff --git a/nbconvert/exporters/templateexporter.py b/nbconvert/exporters/templateexporter.py
+index 0d540eb1..440f6382 100644
+--- a/nbconvert/exporters/templateexporter.py
++++ b/nbconvert/exporters/templateexporter.py
+@@ -616,6 +616,7 @@ class TemplateExporter(Exporter):
+         if DEV_MODE:
+             root_dirs.append(os.path.abspath(os.path.join(ROOT, '..', '..', 'share', 'jupyter')))
+         root_dirs.extend(jupyter_path())
++        root_dirs.append(os.path.join("@out@", "share", "jupyter"))
+         return root_dirs
+ 
+     def _init_resources(self, resources):