diff --git a/frontools/config.py b/frontools/config.py
index c4fa0c6..db26612 100644
--- a/frontools/config.py
+++ b/frontools/config.py
@@ -99,6 +99,10 @@ class Config:
         """Add an url for a theme"""
         self._theme_index.add_nodes(*nodes)
 
+    def ignore_themes(self, *themes: str) -> None:
+        """Don't add given theme to the index, and don't check for them in local sources."""
+        self._theme_index.ignore_themes(*themes)
+
     def add_yaml(self, yaml_path: Union[str, Path]) -> None:
         """Load a yaml file containing dictionnary of urls to add as themes."""
         self._theme_index.add_yaml(Path(yaml_path))
diff --git a/frontools/theme_index.py b/frontools/theme_index.py
index 4983578..7648277 100644
--- a/frontools/theme_index.py
+++ b/frontools/theme_index.py
@@ -36,6 +36,7 @@ class ThemeIndex:
         self._themes: ThemeIndexData = {}
         self._inputs = _Inputs()
         self._local_theme_roots: list[Path] = []
+        self._ignored_themes: set[str] = set()
 
     @property
     def urls(self) -> Iterable[tuple[str, str, set[str]]]:
@@ -56,6 +57,10 @@ class ThemeIndex:
         """Add an url for a theme"""
         self._inputs.nodes.extend(nodes)
 
+    def ignore_themes(self, *themes: str) -> None:
+        """Add an url for a theme"""
+        self._ignored_themes.update(set(themes))
+
     def add_yaml(self, yaml_path: Path) -> None:
         """Load a yaml file containing dictionnary of urls to add as themes."""
         self._inputs.yaml_files.append(yaml_path)
@@ -79,6 +84,7 @@ class ThemeIndex:
             local_themes.update(set(_get_local_themes(theme_root)))
 
         config_themes = set(self._themes)
+        local_themes = local_themes - self._ignored_themes
 
         unknown_themes = config_themes - local_themes
         unconfigured_themes = local_themes - config_themes
@@ -143,8 +149,7 @@ class ThemeIndex:
 
     def _register(self, url: str, new_tags: list[str], theme_name: str) -> None:
         """Add an url for a theme"""
-        if theme_name is None:
-            self._unknown_themes.append((url, new_tags))
+        if theme_name in self._ignored_themes:
             return
 
         theme = self._themes.get(theme_name, None)
@@ -175,7 +180,7 @@ async def _get_theme(url: str) -> Optional[str]:
             ssl_context.check_hostname = False
             ssl_context.verify_mode = CERT_NONE
             ssl_context.set_ciphers("DEFAULT@SECLEVEL=1")
-            async with session.get(url, ssl_context=ssl_context) as response:
+            async with session.get(url, ssl=ssl_context) as response:
                 page_content = await response.content.read()
                 page_html = BeautifulSoup(page_content, features="html5lib")
                 links = page_html.find_all("link")
@@ -198,7 +203,7 @@ async def _get_theme(url: str) -> Optional[str]:
 
 
 CAT_HOBO_JSON_SCRIPT = """
-for hobo_json in $(find /var/lib/combo/ -name hobo.json); do
+for hobo_json in $(find /var/lib/combo/tenants/ -name hobo.json); do
     sudo cat $hobo_json
     echo ","
 done